SECURITIES PURCHASE AGREEMENT

Exhibit 10.1

SECURITIES PURCHASE AGREEMENT

This Securities Purchase Agreement (this “Agreement”) is dated as of March 21, 2007, between Cambridge Heart, Inc., a Delaware corporation (the “Company”), and St. Jude Medical, Inc., a Minnesota corporation (the “Purchaser”).

WHEREAS, subject to the terms and conditions set forth in this Agreement and pursuant to Section 4(2) of the Securities Act (as defined below) and Rule 506 promulgated thereunder, the Company desires to issue and sell to the Purchaser, and the Purchaser desires to purchase from the Company, securities of the Company as more fully described in this Agreement.

NOW, THEREFORE, IN CONSIDERATION of the mutual covenants contained in this Agreement, and for other good and valuable consideration the receipt and adequacy of which are hereby acknowledged, the Company and the Purchaser agree as follows:

ARTICLE I.

DEFINITIONS

1.1 Definitions. In addition to the terms defined elsewhere in this Agreement, for all purposes of this Agreement, the following terms have the meanings indicated in this Section 1.1:

“Action” shall have the meaning ascribed to such term in Section 3.1(j).

“Affiliate” means any Person that, directly or indirectly through one or more intermediaries, controls or is controlled by or is under common control with a Person as such terms are used in and construed under Rule 144 under the Securities Act. With respect to a Purchaser, any investment fund or managed account that is managed on a discretionary basis by the same investment manager as such Purchaser will be deemed to be an Affiliate of such Purchaser.

“Business Day” means any day except Saturday, Sunday and any day which is a federal legal holiday or a day on which banking institutions in the State of New York are authorized or required by law or other governmental action to close.

“Certificate” shall have the meaning ascribed to such term in Section 2.1.

“Closing” means the closing of the purchase and sale of the Shares pursuant to Section 2.1.

“Closing Date” means March 21, 2007.

“Co-Marketing Agreement” means the Co-Marketing Agreement, dated the date hereof, among the Company and the Purchaser, in the form of Exhibit A attached hereto.

“Common Stock” means the common stock of the Company, par value $0.001 per share, and any other class of securities into which such securities may hereafter have been reclassified or changed into.

1

“Common Stock Equivalents” means any securities of the Company or a Subsidiary which entitle the holder thereof to acquire Common Stock at any time, including, without limitation, any debt, preferred stock, rights, options, warrants or other instrument that is at any time convertible into or exercisable or exchangeable for, or otherwise entitles the holder thereof to receive, Common Stock.

“Company Counsel” means Xxxxxx, XxXxxxxxx & Fish LLP.

“Conversion Shares” means the shares of Common Stock issuable upon conversion of the Shares.

“Disclosure Schedules” means the Disclosure Schedules of the Company delivered concurrently herewith.

“Effective Date” means the date that the initial Registration Statement filed by the Company pursuant to the Registration Rights Agreement is first declared effective by the SEC.

“Equitable Exceptions” shall have the meaning ascribed to such term in Section 3.1(c).

“Evaluation Date” shall have the meaning ascribed to such term in Section 3.1(r).

“Exchange Act” means the Securities Exchange Act of 1934, as amended.

“GAAP” shall have the meaning ascribed to such term in Section 3.1(h).

“Intellectual Property Rights” shall have the meaning ascribed to such term in Section 3.1(o).

“Liens” means a lien, charge, security interest, encumbrance, right of first refusal, preemptive right or other restriction.

“Material Adverse Effect” shall have the meaning assigned to such term in Section 3.1(b).

“Material Permits” shall have the meaning ascribed to such term in Section 3.1(m).

“Per Share Purchase Price” equals $2,500.00.

“Person” means an individual or corporation, partnership, trust, incorporated or unincorporated association, joint venture, limited liability company, joint stock company, government (or an agency or subdivision thereof) or other entity of any kind.

“Proceeding” means an action, claim, suit, investigation or proceeding (including, without limitation, an investigation or partial proceeding, such as a deposition), whether commenced or threatened.

2

“Purchaser Party” shall have the meaning ascribed to such term in Section 4.9.

“Purchase Price” shall have the meaning ascribed to such term in Section 2.1.

“Registration Rights Agreement” means the Registration Rights Agreement, dated the date hereof, among the Company and the Purchaser, in the form of Exhibit B attached hereto.

“Registration Statement” means a registration statement meeting the requirements set forth in the Registration Rights Agreement and covering the resale by the Purchasers of the Conversion Shares.

“Required Approvals” shall have the meaning ascribed to such term in Section 3.1(e).

“Rule 144” means Rule 144 promulgated by the SEC pursuant to the Securities Act, as such Rule may be amended from time to time, or any similar rule or regulation hereafter adopted by the SEC having substantially the same effect as such Rule.

“SEC” means the United States Securities and Exchange Commission.

“SEC Reports” shall have the meaning ascribed to such term in Section 3.1(h).

“Securities Act” means the Securities Act of 1933, as amended.

“Shares” means the shares of Series C Preferred Stock, $.001 par value per share (the “Preferred Stock”, issued or issuable to the Purchaser pursuant to this Agreement.

“Subsidiary” means any subsidiary of the Company as defined in Rule 1-02 of Regulation S-X promulgated by the SEC pursuant to the Exchange Act.

“Trading Day” means (i) a day on which the Common Stock is traded on a Trading Market, or (ii) if the Common Stock is not quoted on any Trading Market, a day on which the Common Stock is quoted in the over-the-counter market as reported by the Pink Sheets, LLC (or any similar organization or agency succeeding to its functions of reporting prices); provided, that in the event that the Common Stock is not listed or quoted as set forth in (i) and (ii) hereof, then Trading Day shall mean a Business Day.

“Trading Market” means whichever of the New York Stock Exchange, the American Stock Exchange, the NASDAQ National Market, the NASDAQ SmallCap Market or OTC Bulletin Board on which the Common Stock is listed or quoted for trading on the date in question.

“Transaction Documents” means this Agreement, the Registration Rights Agreement, the Co-Marketing Agreement, the Certificate and any other documents or agreements executed in connection with the transactions contemplated hereunder.

3

ARTICLE II.

PURCHASE AND SALE

2.1 Closing. The Company shall adopt and file with the Secretary of State of the State of Delaware on or before the Closing, a Certificate of Designation of Series C Preferred Stock in the form attached hereto as Exhibit C (the “Certificate”). On the Closing Date, upon the terms and subject to the conditions set forth herein, concurrent with the execution and delivery of this Agreement by the parties hereto, the Company agrees to sell, and the Purchaser agrees to purchase 5,000 Shares at the Per Share Purchase Price, or an aggregate purchase price of $12,500,000 (the “Purchase Price”). Subject to the terms and conditions set forth in this Agreement, the Purchaser shall deliver the Purchase Price to the Company via wire transfer and the Company shall deliver the Shares to the Purchaser at the Closing. Upon satisfaction of the conditions set forth in Sections 2.2 and 2.3, the Closing shall occur at the offices of Company Counsel, or such other location as the parties shall mutually agree.

2.2 Deliveries.

(a) On the Closing Date, the Company shall deliver or cause to be delivered to the Purchaser the following:

(i) this Agreement duly executed by the Company;

(ii) a legal opinion of Company Counsel, in the form of Exhibit D attached hereto;

(iii) a certificate or certificates representing the Shares, registered in the name of the Purchaser;

(iv) a copy of the Certificate as filed with the Secretary of State of the State of Delaware;

(v) the Co-Marketing Agreement duly executed by the Company; and

(vi) the Registration Rights Agreement duly executed by the Company.

(b) On the Closing Date, the Purchaser shall deliver or cause to be delivered to the Company the following:

(i) this Agreement duly executed by the Purchaser;

(ii) the Co-Marketing Agreement duly executed by the Purchaser

(iii) the Purchase Price by wire transfer to the account as specified in writing by the Company; and

(iv) the Registration Rights Agreement duly executed by the Purchaser.

4

2.3 Closing Conditions.

(a) The obligations of the Company hereunder in connection with the Closing are subject to the following conditions being met:

(i) the accuracy in all material respects when made and on the Closing Date of the representations and warranties of the Purchaser contained herein;

(ii) all obligations, covenants and agreements of the Purchaser required to be performed at or prior to the Closing Date shall have been performed; and

(iii) the delivery by the Purchasers of the items set forth in Section 2.2(b) of this Agreement.

(b) The obligations of the Purchaser hereunder in connection with the Closing are subject to the following conditions being met:

(i) the accuracy in all material respects when made and on the Closing Date of the representations and warranties of the Company contained herein;

(ii) all obligations, covenants and agreements of the Company required to be performed at or prior to the Closing Date shall have been performed;

(iii) the delivery by the Company of the items set forth in Section 2.2(a) of this Agreement; and

(iv) there shall have been no Material Adverse Effect with respect to the Company since the date hereof.

ARTICLE III.

REPRESENTATIONS AND WARRANTIES

3.1 Representations and Warranties of the Company. Except as set forth under the corresponding section of the Disclosure Schedules, the Company hereby makes the representations and warranties set forth below to the Purchaser:

(a) Subsidiaries. The Company has no subsidiaries.

(b) Organization and Qualification. The Company is duly incorporated, validly existing and in good standing under the laws of the State of Delaware, with the requisite power and authority to own and use its properties and assets and to carry on its business as currently conducted. The Company is not in violation or default of any of the provisions of its certificate of incorporation or bylaws. The Company is duly qualified to conduct its business and is in good standing as a foreign corporation in each jurisdiction in which the nature of the business conducted or property owned by it makes such qualification necessary, except where the failure to be so qualified or in good standing, as the case may be, could not have or reasonably be expected to result in (i) a material and adverse effect on the legality, validity or enforceability of any Transaction Document, (ii) a material and adverse effect on the results of operations, assets, business, prospects or

5

condition (financial or otherwise) of the Company, or (iii) a material adverse effect on the Company’s ability to perform in any material respect on a timely basis its obligations under any Transaction Document (any of (i), (ii) or (iii), a “Material Adverse Effect”); and no Proceeding has been instituted in any such jurisdiction revoking, limiting or curtailing or seeking to revoke, limit or curtail such power and authority or qualification.

(c) Authorization; Enforcement. The Company has the requisite corporate power and authority to enter into and to consummate the transactions contemplated by each of the Transaction Documents and otherwise to carry out its obligations hereunder and thereunder. The execution and delivery of each of the Transaction Documents by the Company and the consummation by it of the transactions contemplated thereby have been duly authorized by all necessary action on the part of the Company and no further action is required by the Company, its board of directors or its stockholders in connection therewith other than in connection with the Required Approvals. Each Transaction Document has been (or upon delivery will have been) duly executed by the Company and, when delivered in accordance with the terms hereof and thereof, will constitute the valid and binding obligation of the Company enforceable against the Company in accordance with its terms except (i) as such enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium, liquidation and other similar laws of general application affecting enforcement of creditors’ rights generally, (ii) as limited by laws relating to the availability of specific performance, injunctive relief or other equitable remedies and (iii) insofar as indemnification and contribution provisions may be limited by applicable law (collectively, the “Equitable Exceptions”).

(d) No Conflicts. The execution, delivery and performance of the Transaction Documents by the Company, the issuance and sale of the Shares, the issuance of the Conversion Shares, and the consummation by the Company of the other transactions contemplated hereby and thereby do not and will not (i) conflict with or violate any provision of the Company’s certificate of incorporation or bylaws, or (ii) conflict with, or constitute a default (or an event that with notice or lapse of time or both would become a default) under, result in the creation of any Lien upon any of the properties or assets of the Company, or give to others any rights of termination, amendment, acceleration or cancellation (with or without notice, lapse of time or both) of, any agreement, credit facility, debt or other instrument (evidencing a Company debt or otherwise) or other understanding to which the Company is a party or by which any property or asset of the Company is bound or affected, or (iii) subject to the Required Approvals, conflict with or result in a violation of any law, rule, regulation, order, judgment, injunction, decree or other restriction of any court or governmental authority to which the Company is subject (including federal and state securities laws and regulations), or by which any property or asset of the Company is bound or affected; except in the case of each of clauses (ii) and (iii), such as could not have or reasonably be expected to result in a Material Adverse Effect.

(e) Filings, Consents and Approvals. The Company is not required to obtain any consent, waiver, authorization or order of, give any notice to, or make any filing or registration with, any court or other federal, state, local or other governmental authority or other Person in connection with the execution, delivery and performance by the

6

Company of the Transaction Documents, other than (i) filings required pursuant to Section 4.4 of this Agreement, (ii) the filing with the SEC of the Registration Statement, and (iii) the filing of Form D with the SEC and such filings as are required to be made under applicable state securities laws (collectively, the “Required Approvals”).

(f) Issuance of the Shares. The Shares are duly authorized and, when issued and paid for in accordance with the applicable Transaction Documents, will be duly and validly issued, fully paid and nonassessable, free and clear of all Liens imposed by the Company other than restrictions on transfer provided for in the Transaction Documents. The Conversion Shares, when issued in accordance with the terms of the Transaction Documents, will be validly issued, fully paid and nonassessable, free and clear of all Liens imposed by the Company other than restrictions on transfer provided for in the Transaction Documents. As of the Closing, the Company will have reserved from its duly authorized capital stock 110% of the number of shares of Common Stock issuable upon conversion of the Shares as of the Closing.

(g) Capitalization. The capitalization of the Company is as set forth on Schedule 3.1(g). The Company has not issued any capital stock since its most recently filed periodic report under the Exchange Act, other than pursuant to the exercise of employee stock options under the Company’s stock option plans, the issuance of shares of Common Stock to employees pursuant to existing employee benefit plans or pursuant to the conversion or exercise of outstanding Common Stock Equivalents. No Person has any right of first refusal, preemptive right, right of participation, or any similar right to participate in the transactions contemplated by the Transaction Documents. Except as a result of the purchase and sale of the Shares, as set forth in the Company’s most recently filed periodic report under the Exchange Act or as set forth on Schedule 3.1(g), there are no outstanding options, warrants, script rights to subscribe to, calls or commitments of any character whatsoever relating to, or securities, rights or obligations convertible into or exercisable or exchangeable for, or giving any Person any right to subscribe for or acquire, any shares of Common Stock, or contracts, commitments, understandings or arrangements by which the Company is or may become bound to issue additional shares of Common Stock or Common Stock Equivalents. The issuance and sale of the Shares will not obligate the Company to issue shares of Common Stock or other securities to any Person (other than the Purchaser) and will not result in a right of any holder of Company securities to adjust the exercise, conversion, exchange or reset price under such securities. All of the outstanding shares of capital stock of the Company are validly issued, fully paid and nonassessable, have been issued in compliance with all federal and state securities laws, and none of such outstanding shares was issued in violation of any preemptive rights or similar rights to subscribe for or purchase securities. Any statements in the SEC Reports (as defined below) regarding employee and director stock options are accurate in all material respects. The Company has previously provided the Purchaser with an internal analysis of its stock option grants and practices, which is accurate in all material respects regarding such stock option grants and practices and the Company had a reasonable basis for the conclusions contained therein, which were made in good faith. There are no stockholders agreements, voting agreements or other similar agreements with respect to the Company’s capital stock to which the Company is a party or, to the knowledge of the Company, between or among any of the Company’s stockholders.

7

(h) SEC Reports; Financial Statements. The Company has filed all reports, schedules, forms, statements and other documents required to be filed by it under the Securities Act and the Exchange Act, including pursuant to Section 13(a) or 15(d) thereof, for the two years preceding the date hereof (the foregoing materials, including the exhibits thereto and documents incorporated by reference therein, being collectively referred to herein as the “SEC Reports”) on a timely basis or has received a valid extension of such time of filing and has filed any such SEC Reports prior to the expiration of any such extension. As of their respective dates, the SEC Reports complied in all material respects with the requirements of the Securities Act and the Exchange Act and the rules and regulations of the SEC promulgated thereunder, and none of the SEC Reports, when filed, contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. The financial statements of the Company included in the SEC Reports comply in all material respects with applicable accounting requirements and the rules and regulations of the SEC with respect thereto as in effect at the time of filing. Such financial statements have been prepared in accordance with United States generally accepted accounting principles (“GAAP”) applied on a consistent basis during the periods involved, except as may be otherwise specified in such financial statements or the notes thereto and except that unaudited financial statements may not contain all footnotes required by GAAP, and fairly present in all material respects the financial position of the Company as of and for the dates thereof and the results of operations and cash flows for the periods then ended, subject, in the case of unaudited statements, to normal, immaterial, year-end audit adjustments.

(i) Material Changes. Since the date of the latest audited financial statements included within the SEC Reports, except as specifically disclosed in the SEC Reports, (i) there has been no event, occurrence or development that has had or that could reasonably be expected to result in a Material Adverse Effect, (ii) the Company has not incurred any liabilities (contingent or otherwise) other than (A) trade payables and accrued expenses incurred in the ordinary course of business consistent with past practice and (B) liabilities not required to be reflected in the Company’s financial statements pursuant to GAAP or required to be disclosed in filings made with the SEC, (iii) the Company has not altered its method of accounting, (iv) the Company has not declared or made any dividend or distribution of cash or other property to its stockholders or purchased, redeemed or made any agreements to purchase or redeem any shares of its capital stock and (v) the Company has not issued any equity securities to any officer, director or Affiliate, except pursuant to existing Company stock option or stock plans. The Company does not have pending before the SEC any request for confidential treatment of information.

(j) Litigation. There is no action, suit, inquiry, notice of violation, proceeding or investigation pending or, to the knowledge of the Company, threatened in writing against or affecting the Company or any of its properties before or by any court, arbitrator, governmental or administrative agency or regulatory authority (federal, state, county, local or foreign) (collectively, an “Action”) which (i) adversely affects or challenges the legality, validity or enforceability of any of the Transaction Documents or the Shares or (ii) could, if there were an unfavorable decision, individually or in the aggregate, have or

8

reasonably be expected to result in a Material Adverse Effect. No director or officer of the Company is or has been the subject of any Action involving a claim of violation of or liability under federal or state securities laws or a claim of breach of fiduciary duty within the last five years. There has not been, and to the knowledge of the Company, there is not pending or contemplated, any investigation by the SEC involving the Company or to the knowledge of the Company any current or former director or officer of the Company. The SEC has not issued any stop order or other order suspending the effectiveness of any registration statement filed by the Company or any Subsidiary under the Exchange Act or the Securities Act.

(k) Labor Relations. No material labor dispute exists or, to the knowledge of the Company, is imminent with respect to any of the employees of the Company which could reasonably be expected to result in a Material Adverse Effect.

(l) Compliance. The Company (i) neither is in default under or in violation of (and no event has occurred that has not been waived that, with notice or lapse of time or both, would result in a default by the Company under), nor has the Company received notice of a claim that it is in default under or that it is in violation of, any indenture, loan or credit agreement or any other agreement or instrument to which it is a party or by which it or any of its properties is bound (whether or not such default or violation has been waived), (ii) is in violation of any order of any court, arbitrator or governmental body, or (iii) is or has been in violation of any statute, rule or regulation of any governmental authority, including without limitation all foreign, federal, state and local laws applicable to its business except in each case as could not have a Material Adverse Effect.

(m) Regulatory Permits. The Company and the Subsidiaries possess all certificates, authorizations and permits issued by the appropriate federal, state, local or foreign regulatory authorities necessary to conduct their respective businesses as described in the SEC Reports, except where the failure to possess such permits could not have a Material Adverse Effect (“Material Permits”), and neither the Company nor any Subsidiary has received any notice of proceedings relating to the revocation or modification of any Material Permit.

(n) Title to Assets. The Company owns no real property and has good title in all personal property owned by them that is material to the business of the Company, in each case free and clear of all Liens, except for Liens as do not materially affect the value of such property and do not materially interfere with the use made and proposed to be made of such property by the Company and Liens for the payment of federal, state or other taxes, the payment of which is neither delinquent nor subject to penalties. Any real property and facilities held under lease by the Company are held by it under valid, subsisting and enforceable leases of which the Company is in compliance, except as could not have or reasonably be expected to result in a Material Adverse Effect.

(o) Patents and Trademarks. The Company and the Subsidiaries have, or have rights to use, all patents, patent applications, trademarks, trademark applications, service marks, trade names, copyrights, licenses and other similar rights that are necessary or

9

material for use in connection with their respective businesses as described in the SEC Reports and which the failure to so have could have or reasonably be expected to result in a Material Adverse Effect (collectively, the “Intellectual Property Rights”). Neither the Company nor any Subsidiary has (i) received a written notice that the Intellectual Property Rights used by the Company or any Subsidiary violates or infringes upon the rights of any Person, or (ii) received a written invitation to license any Intellectual Property Rights of a Person in order to avoid such a violation or infringement. To the knowledge of the Company, all such Intellectual Property Rights are enforceable (subject to the Equitable Exceptions) and there is no existing infringement by another Person of any of the Intellectual Property Rights.

(p) Insurance. The Company is insured by insurers of recognized financial responsibility against such losses and risks, including, without limitation, products liability, and in such amounts as are prudent and customary in the businesses in which the Company is engaged, including, but not limited to, directors and officers insurance coverage at least equal to $10.0 million. To the best knowledge of the Company, such insurance contracts and policies are accurate and complete. The Company has no reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business on terms consistent with market for the Company’s line of business.

(q) Transactions With Affiliates and Employees. Except as set forth in the SEC Reports, none of the officers or directors of the Company, or any person who served as an officer or director in the 12 months prior to the date of this Agreement, and, to the knowledge of the Company, none of the employees of the Company is presently a party to any transaction with the Company or any Subsidiary (other than for services as employees, officers and directors), including any contract, agreement or other arrangement providing for the furnishing of services to or by, providing for rental of real or personal property to or from, or otherwise requiring payments to or from any officer, director or such employee or, to the knowledge of the Company, any entity in which any officer, director, or any such employee has a substantial interest or is an officer, director, trustee or partner, in each case in excess of $120,000 other than (i) for payment of salary or consulting fees for services rendered, (ii) reimbursement for expenses incurred on behalf of the Company and (iii) for other equity compensation or employee benefits, including, without limitation stock option agreements under any stock option plan of the Company.

(r) Xxxxxxxx-Xxxxx; Internal Accounting Controls. The Company is in material compliance with all provisions of the Xxxxxxxx-Xxxxx Act of 2002 which are applicable to it as of the Closing Date. The Company maintains a system of internal accounting controls sufficient to provide reasonable assurance that (i) transactions are executed in accordance with management’s general or specific authorizations, (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain asset accountability, (iii) access to assets is permitted only in accordance with management’s general or specific authorization, and (iv) the recorded accountability for assets is compared with the existing assets at reasonable intervals and

10

appropriate action is taken with respect to any differences. The Company has established disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the Company and designed such disclosure controls and procedures to ensure that material information relating to the Company, including its Subsidiaries, is made known to the certifying officers by others within those entities, particularly during the period in which the Company’s most recently filed periodic report under the Exchange Act, as the case may be, is being prepared. The Company’s certifying officers have evaluated the effectiveness of the Company’s controls and procedures as of the date prior to the filing date of the most recently filed periodic report under the Exchange Act (such date, the “Evaluation Date”). The Company presented in its most recently filed periodic report under the Exchange Act the conclusions of the certifying officers about the effectiveness of the disclosure controls and procedures based on their evaluations as of the Evaluation Date. Since the Evaluation Date, there have been no significant changes in the Company’s internal controls (as such term is defined in Item 307(b) of Regulation S-K under the Exchange Act) or, to the knowledge of the Company, in other factors that could significantly affect the Company’s internal controls.

(s) Certain Fees. Except for the fees payable to Bank of America, no brokerage or finder’s fees or commissions are or will be payable by the Company to any broker, financial advisor or consultant, finder, placement agent, investment banker, bank or other Person with respect to the transactions contemplated by the Transaction Documents. The Purchaser shall have no obligation with respect to any fees or with respect to any claims made by or on behalf of Bank of America other Persons for fees of a type contemplated in this Section that may be due in connection with the transactions contemplated by the Transaction Documents.

(t) Private Placement. Assuming the accuracy of the Purchaser’s representations and warranties set forth in Section 3.2, no registration under the Securities Act is required for the offer and sale of the Shares by the Company to the Purchaser as contemplated hereby. The issuance and sale of the Shares hereunder does not contravene the rules and regulations of the Trading Market.

(u) Investment Company. The Company is not, and is not an Affiliate of, and immediately after receipt of payment for the Shares, will not be or be an Affiliate of, an “investment company” within the meaning of the Investment Company Act of 1940, as amended.

(v) Registration Rights. Other than the Purchaser, no Person has any right to cause the Company to effect the registration under the Securities Act of any securities of the Company.

(w) Listing and Maintenance Requirements. The Company’s Common Stock is registered pursuant to Section 12(g) of the Exchange Act, and the Company has taken no action designed to, or which to its knowledge is likely to have the effect of, terminating the registration of the Common Stock under the Exchange Act nor has the Company received any notification that the SEC is contemplating terminating such registration.

11

(x) Application of Takeover Protections. The Company and its Board of Directors have taken all necessary action, if any, in order to render inapplicable any control share acquisition, business combination, poison pill (including any distribution under a rights agreement) or other similar anti-takeover provision under the Company’s Certificate of Incorporation (or similar charter documents) or the laws of its state of incorporation that is or could become applicable to the Purchaser as a result of the Purchaser and the Company fulfilling their obligations or exercising their rights under the Transaction Documents, including without limitation as a result of the Company’s issuance of the Shares and the Purchaser’s ownership of the Shares.

(y) Disclosure. All disclosure provided to the Purchaser regarding the Company, its business and the transactions contemplated hereby, including the Disclosure Schedules to this Agreement, furnished by or on behalf of the Company with respect to the representations and warranties made herein are true and correct with respect to such representations and warranties and do not contain any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements made therein, in light of the circumstances under which they were made, not misleading. The Company acknowledges and agrees that the Purchaser does not make and has not made any representations or warranties with respect to the transactions contemplated hereby other than those specifically set forth in Section 3.2 hereof, in the Co-Marketing Agreement and in the Registration Rights Agreement.

(z) No Integrated Offering. Assuming the accuracy of the Purchaser’s representations and warranties set forth in Section 3.2, neither the Company, nor any of its affiliates, nor any Person acting on its or their behalf has, directly or indirectly, made any offers or sales of any security or solicited any offers to buy any security, under circumstances that would cause this offering of the Shares to be integrated with prior offerings by the Company for purposes of the Securities Act or any applicable stockholder approval provisions, including, without limitation, under the rules and regulations of any Trading Market on which any of the securities of the Company are listed or designated.

(aa) Solvency. Based on the financial condition of the Company as of the Closing Date after giving effect to the receipt by the Company of the proceeds from the sale of the Shares hereunder, (i) the Company’s fair saleable value of its assets exceeds the amount that will be required to be paid on or in respect of the Company’s existing debts and other liabilities (including known contingent liabilities) as they mature; (ii) the Company’s assets do not constitute unreasonably small capital to carry on its business for the current fiscal year as now conducted and as proposed to be conducted including its capital needs taking into account the particular capital requirements of the business conducted by the Company, and projected capital requirements and capital availability thereof; and (iii) the current cash flow of the Company, together with the proceeds the Company would receive, were it to liquidate all of its assets, after taking into account all anticipated uses of the cash, would be sufficient to pay all amounts on or in respect of its debt when such amounts are required to be paid. The Company does not intend to incur debts beyond its ability to pay such debts as they mature (taking into account the timing and amounts of cash to be payable on or in respect of its debt). The Company has no

12

knowledge of any facts or circumstances which lead it to believe that it will file for reorganization or liquidation under the bankruptcy or reorganization laws of any jurisdiction within one year from the Closing Date. The SEC Reports set forth as of the dates thereof all outstanding secured and unsecured Indebtedness of the Company or any Subsidiary, or for which the Company or any Subsidiary has commitments. For the purposes of this Agreement, “Indebtedness” shall mean (a) any liabilities for borrowed money or amounts owed in excess of $50,000 (other than trade accounts payable incurred in the ordinary course of business), (b) all guaranties, endorsements and other contingent obligations in respect of Indebtedness of others, whether or not the same are or should be reflected in the Company’s balance sheet (or the notes thereto), except guaranties by endorsement of negotiable instruments for deposit or collection or similar transactions in the ordinary course of business; and (c) the present value of any lease payments in excess of $50,000 due under leases required to be capitalized in accordance with GAAP. The Company is not in default with respect to any Indebtedness.

(bb) Tax Status. Except for matters that would not, individually or in the aggregate, have or reasonably be expected to result in a Material Adverse Effect, the Company (i) has filed all necessary federal, state and foreign income and franchise tax returns and has paid or accrued all taxes shown as due thereon, and (ii) has no knowledge of a tax deficiency which has been asserted or threatened against the Company.

(cc) No General Solicitation. Neither the Company nor any person acting on behalf of the Company has offered or sold any of the Shares by any form of general solicitation or general advertising. The Company has offered the Shares for sale only to the Purchaser.

(dd) Foreign Corrupt Practices. Neither the Company, nor to the knowledge of the Company, any agent or other person acting on behalf of the Company, has (i) directly or indirectly, used any funds for unlawful contributions, gifts, entertainment or other unlawful expenses related to foreign or domestic political activity, (ii) made any unlawful payment to foreign or domestic government officials or employees or to any foreign or domestic political parties or campaigns from corporate funds, (iii) failed to disclose fully any contribution made by the Company (or made by any person acting on its behalf of which the Company is aware) which is in violation of law, or (iv) violated in any material respect any provision of the Foreign Corrupt Practices Act of 1977, as amended.

(ee) Accountants. The Company’s accountants are set forth in the SEC Reports. To the knowledge of the Company, such accountants, who the Company expects will express their opinion with respect to the financial statements to be included in the Company’s Annual Report on Form 10-K for the year ending December 31, 2006, are a registered public accounting firm as required by the Securities Act.

(ff) Manipulation of Price. The Company has not, and to its knowledge no one acting on its behalf has, (i) taken, directly or indirectly, any action designed to cause or to result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of any of the Shares, (ii) sold, bid for, purchased, or, paid any compensation for soliciting purchases of, any of the Shares (other than for the placement agent’s placement of the Shares), or (iii) paid or agreed to pay to any person any compensation for soliciting another to purchase any other Shares of the Company.

13

(gg) FDA Compliance. The conduct of business by the Company complies, and at all times has substantially complied, in all material respects with (a) the Federal Food, Drug and Cosmetic Act and similar federal, state, local and foreign laws applicable to the evaluation, testing, manufacturing, distribution, advertising and marketing of each of the Company’s products, in whatever stage of development or commercialization, and (b) the Federal Anti-Kickback Statute and any similar health care fraud and abuse laws. The Company has not received any notification asserting, or has no knowledge of, any present or past failure to comply with or violation of any such act and statutes.

(hh) Clinical Studies. Except to the extent disclosed in the SEC Reports, the clinical, pre-clinical and other studies, tests and research conducted by or on behalf of or sponsored by the Company are, and at all times have been, conducted in accordance with the Federal Food, Drug and Cosmetic Act and the regulations promulgated thereunder, as well as other applicable federal, state, local and foreign laws, and consistent with current clinical and scientific research standards and procedures, except where the failure to be so conducted would not have a Material Adverse Effect. The descriptions of the results of such studies, tests and research are accurate in all material respects and fairly present the data derived from such studies, tests and research, and the Company has no knowledge of any other studies, tests or research the results of which are inconsistent with or otherwise call into question the results described or referred to in the SEC Reports. Except to the extent disclosed in the SEC Reports, the Company has not notified the Food and Drug Administration (the “FDA”) of any adverse events with respect to any clinical or pre-clinical studies, tests or research that are described in the SEC Reports or the results of which are referred to in the SEC Reports and the Company has not received any notices or other correspondence from the FDA or any other foreign, federal, state or local governmental or regulatory authority with respect to any clinical or pre-clinical studies, tests or research that are described in the SEC Reports or the results of which are referred to in the SEC Reports which require the termination, suspension, delay or modification of such studies, tests or research, otherwise require the Company to engage in any remedial activities with respect to such studies, test or research, or threaten to impose or actually impose any fines or other disciplinary actions.

(ii) Warnings. Except to the extent disclosed in the SEC Reports and as would not have a Material Adverse Effect, the Company has not received any Form 483s or other Notices of Adverse Findings or Warning Letters from the FDA or similar forms, notices or letters from any other regulatory agency in which the agency asserts that the operations or facilities of the Company or in which the Company’s products are manufactured may not be in compliance with applicable laws. The Company has not received any written or oral notice that the FDA or any other regulatory agency has commenced, or threatened to initiate, any action to withdraw its approval, request a recall or halt distribution of any of the Company’s products, or commenced or threatened to initiate any action to seize, or enjoin the production of, any of the Company’s products.

14

(jj) Compliance Program. The Company has established and administers a compliance program (including a written compliance policy) applicable to the Company, to assist the Company and the directors, officers and employees of the Company in complying with applicable regulatory guidelines (including, without limitation, those administered by the FDA and any foreign, federal, state or local governmental or regulatory authority performing functions similar to those performed by the FDA) and to provide compliance policies governing applicable areas for medical device companies (including, without limitation, pre-clinical and clinical testing, product design and development, product testing, product manufacturing, product labeling, product storage, premarket clearance and approval, advertising and promotion, product sales and distribution, medical device reporting regulations, and record keeping).

(kk) FDA Filings. The Company has not failed to file with the applicable regulatory authorities (including, without limitation, the FDA or any foreign, federal, state or local governmental or regulatory authority performing functions similar to those performed by the FDA) any filing, declaration, listing, registration, report or submission required by law; all such filings, declarations, listing, registrations, reports or submission were in compliance with applicable laws when filed and no deficiencies have been asserted by any applicable regulatory authority (including, without limitation, the FDA or any foreign, federal, state or local governmental or regulatory performing functions similar to those performed by the FDA) with respect to any such filings, declarations, listings, registrations, reports or submissions.

(ll) No False Statements. Neither the Company nor any officer, employee or agent of the Company has made an untrue statement of a material fact or fraudulent statement to the FDA or any other governmental entity, failed to disclose a material fact required to be disclosed to the FDA or any other governmental entity, or committed an act, made a statement, or failed to make a statement that, at the time such disclosure was made, in each case, relating to Company’s business, could reasonably be expected to provide a basis for the FDA or any other governmental entity to invoke any policies respecting Fraud, Untrue Statements of Material Facts, Bribery, and Illegal Gratuities, including but not limited to the FDA policy set forth in 56 Fed. Reg. 46191 (September 10, 1991) or any similar policy. The Company has not been convicted of any crime or engaged in any conduct for which debarment is mandated by 21 U.S.C. § 335a(a) or any similar law for which debarment is authorized by 21 U.S.C. § 335a(b) or any similar law.

3.2 Representations and Warranties of the Purchasers. The Purchaser hereby represents and warrants as of the date hereof and as of the Closing Date to the Company as follows:

(a) Organization; Authority. The Purchaser is an entity duly organized, validly existing and in good standing under the laws of the jurisdiction of its organization with full right, corporate or partnership power and authority to enter into and to consummate the transactions contemplated by the Transaction Documents and otherwise to carry out its obligations hereunder and thereunder. The execution, delivery and performance by the Purchaser of the transactions contemplated by this Agreement have been duly authorized by all necessary corporate or similar action on the part of such Purchaser. Each Transaction Document to which it is a party has been duly executed by the Purchaser, and

15

when delivered by the Purchaser in accordance with the terms hereof, will constitute the valid and legally binding obligation of the Purchaser, enforceable against it in accordance with its terms, except (i) as such enforceability may be limited by general equitable principles and applicable bankruptcy, insolvency, reorganization, moratorium, liquidation and other similar laws of general application affecting enforcement of creditors’ rights generally, (ii) as limited by laws relating to the availability of specific performance, injunctive relief or other equitable remedies and (iii) insofar as indemnification and contribution provisions may be limited by applicable law.

(b) Own Account. The Purchaser understands that the Shares and Conversion Shares are restricted securities and have not been registered under the Securities Act or any applicable state securities law and is acquiring the Shares as principal for its own account and not with a view to or for distributing or reselling the Shares or any part thereof in violation of the Securities Act or any applicable state securities law, has no present intention of distributing any of such Securities in violation of the Securities Act or any applicable state securities law and has no arrangement or understanding with any other persons regarding the distribution of the Shares or Conversion Shares (this representation and warranty not limiting such Purchaser’s right to sell the Conversion Shares pursuant to the Registration Statement or otherwise in compliance with applicable federal and state securities laws) in violation of the Securities Act or any applicable state securities law. The Purchaser does not have any agreement or understanding, directly or indirectly, with any Person to distribute any of the Shares or Conversion Shares.

(c) Purchaser Status. At the time the Purchaser was offered the Shares, it was, and at the date hereof it is, and on each date on which it converts the Shares into Conversion Shares, it will be either: (i) an “accredited investor” as defined in Rule 501(a)(1), (a)(2), (a)(3), (a)(7) or (a)(8) under the Securities Act or (ii) a “qualified institutional buyer” as defined in Rule 144A(a) under the Securities Act. Such Purchaser is not required to be registered as a broker-dealer under Section 15 of the Exchange Act.

(d) Experience of Such Purchaser. The Purchaser, either alone or together with its representatives, has such knowledge, sophistication and experience in business and financial matters so as to be capable of evaluating the merits and risks of the prospective investment in the Shares and Conversion Shares, and has so evaluated the merits and risks of such investment. The Purchaser is able to bear the economic risk of an investment in the Shares and, at the present time, is able to afford a complete loss of such investment.

(e) General Solicitation. The Purchaser is not purchasing the Shares as a result of any advertisement, article, notice or other communication regarding the Shares published in any newspaper, magazine or similar media or broadcast over television or radio or presented at any seminar or any other general solicitation or general advertisement.

(f) Access to Information. The Purchaser acknowledges that it has reviewed the Disclosure Schedules and has been afforded (i) the opportunity to ask such questions as it has deemed necessary of, and to receive answers from, representatives of the Company concerning the terms and conditions of the offering of the Shares and the merits and risks

16

of investing in the Shares; (ii) access to information about the Company and its financial condition, results of operations, business, properties, management and prospects sufficient to enable it to evaluate its investment; and (iii) the opportunity to obtain such additional information that the Company possesses or can acquire without unreasonable effort or expense that is necessary to make an informed investment decision with respect to the investment. Neither such inquiries nor any other investigation conducted by or on behalf of the Purchaser or its representatives or counsel shall modify, amend or affect the Purchaser’s right to rely on the truth, accuracy and completeness of the Disclosure Schedules and the Company’s representations and warranties contained in the Transaction Documents.

(g) Disclosure. The Purchaser acknowledges and agrees that the Company does not make and has not made any representations or warranties with respect to the transactions contemplated hereby other than those specifically set forth in Section 3.1 hereof, in the Co-Marketing Agreement and in the Registration Rights Agreement.

ARTICLE IV.

OTHER AGREEMENTS OF THE PARTIES

4.1 Transfer Restrictions. (a) The Shares and Conversion Shares may only be disposed of in compliance with state and federal securities laws. In connection with any transfer of the Shares or Conversion Shares other than pursuant to an effective registration statement or Rule 144, to the Company or to an affiliate of a Purchaser or in connection with a pledge as contemplated in Section 4.1(b), the Company may require the transferor thereof to provide to the Company an opinion of counsel selected by the transferor and reasonably acceptable to the Company, the form and substance of which opinion shall be reasonably satisfactory to the Company, to the effect that such transfer does not require registration of such transferred Shares under the Securities Act.

(b) The Purchaser agrees to the imprinting, so long as is required by this Section 4.1(b), of a legend on any of the Shares or Conversion Shares in the following form:

THESE SHARES HAVE NOT BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS AS EVIDENCED BY A LEGAL OPINION OF COUNSEL TO THE TRANSFEROR TO SUCH EFFECT, THE SUBSTANCE OF WHICH SHALL BE REASONABLY ACCEPTABLE TO THE COMPANY. THESE SHARES MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT WITH A

17

REGISTERED BROKER-DEALER OR OTHER LOAN WITH A FINANCIAL INSTITUTION THAT IS AN “ACCREDITED INVESTOR” AS DEFINED IN RULE 501(a) UNDER THE SECURITIES ACT.

The Company acknowledges and agrees that a Purchaser may from time to time pledge or grant a security interest in some or all of the Shares or Conversion Shares to a financial institution that is an “accredited investor” as defined in Rule 501(a) under the Securities Act and who agrees to be bound by the provisions of this Agreement and the Registration Rights Agreement and, if required under the terms of such arrangement, such Purchaser may transfer pledged or secured Shares to the pledgees or secured parties. Such a pledge or transfer would not be subject to approval of the Company and no legal opinion of legal counsel of the pledgee, secured party or pledgor shall be required in connection therewith. Further, no notice shall be required of such pledge. At the Purchaser’s expense, the Company will execute and deliver such reasonable documentation as a pledgee or secured party of Shares or Conversion Shares may reasonably request in connection with a pledge or transfer of the Shares or Conversion Shares, including, if the Conversion Shares are subject to registration pursuant to the Registration Rights Agreement, the preparation and filing of any required prospectus supplement under Rule 424(b)(3) under the Securities Act or other applicable provision of the Securities Act to appropriately amend the list of Selling Stockholders thereunder.

(c) Certificates evidencing the Shares and Conversion Shares shall not contain any legend (including the legend set forth in Section 4.1(b)), (i) following the resale of the Shares or the Conversion Shares pursuant to an effective registration statement (including the Registration Statement) covering the resale of such security under the Securities Act, or (ii) following any sale of such Shares or Conversion Shares pursuant to Rule 144 (assuming the transferor is not an Affiliate of the Company), or (iii) if such Shares or Conversion Shares are eligible for sale under Rule 144(k), or (iv) if such legend is not required under applicable requirements of the Securities Act and the rules and regulations promulgated thereunder (including judicial interpretations and pronouncements issued by the staff of the SEC). The Company agrees that at such time as such legend is no longer required under this Section 4.1(c), it will, no later than three Trading Days following the delivery by a Purchaser to the Company or the Company’s transfer agent of a certificate representing Conversion Shares, as the case may be, issued with a restrictive legend, deliver or cause to be delivered to such Purchaser a certificate representing such shares that is free from all restrictive and other legends. The Company may not make any notation on its records or give instructions to any transfer agent of the Company that enlarge the restrictions on transfer set forth in this Section. Certificates for Conversion Shares subject to legend removal hereunder shall be transmitted by the transfer agent of the Company to the Purchasers by crediting the account of the Purchaser’s prime broker with the Depository Trust Company System.

4.2 Furnishing of Information. As long as the Purchaser owns Shares or Conversion Shares, the Company covenants to timely file (or obtain extensions in respect thereof and file within the applicable grace period) all reports required to be filed by the Company after the date hereof pursuant to the Exchange Act. As long as the Purchaser owns Shares or Conversion Shares, if the Company is not required to file reports pursuant to the Exchange Act, it will

18

prepare and furnish to the Purchaser and make publicly available in accordance with Rule 144(c) such information as is required for the Purchaser to sell the Shares or Conversion Shares under Rule 144. The Company further covenants that it will take such further action as the Purchaser may reasonably request, all to the extent required from time to time to enable the Purchaser to sell Shares or conversion Shares without registration under the Securities Act within the limitation of the exemptions provided by Rule 144.

4.3 Integration. The Company shall not sell, offer for sale or solicit offers to buy or otherwise negotiate in respect of any security (as defined in Section 2 of the Securities Act) that would be integrated with the offer or sale of the Shares in a manner that would require the registration under the Securities Act of the sale of the Shares to the Purchaser or that would be integrated with the offer or sale of the Shares for purposes of the rules and regulations of any Trading Market such that it would require stockholder approval of the sale of the Shares to the Purchasers unless stockholder approval is obtained before the closing of such subsequent transaction.

4.4 Confidentiality; Required Disclosure. Each party agrees, and will cause its affiliates, to keep confidential and not to publish (by press release, press interview, or otherwise) or otherwise divulge or use for its own benefit or for the benefit of any third party any information of a confidential or proprietary nature furnished to it by the other party, or the existence and terms of this Agreement or the Co-Marketing Agreement or the existence or results of the parties’ collaboration hereunder or thereunder, without the prior written approval of the other party, except to those of such party’s employees and representatives as may need to know such information for purposes of the transactions contemplated by the parties’ agreements, and except as required by applicable law or by obligations pursuant to any listing agreement with or rules of any Trading Market. In the event of any such required disclosure, including the filings described in Section 4.4(b) below, the disclosing party will (i) provide the other party with written notice of the required disclosure at least 48 hours in advance of such disclosure, and (ii) limit such disclosure to the minimum required under the applicable law or obligations, whether through a request for confidential treatment or otherwise. The confidentiality obligation described above shall not apply to information of the other party which: (a) was already known by the recipient prior to the time of its disclosure by the disclosing party to the recipient; (b) is publicly available or later becomes publicly available through no fault of the recipient; or (c) is disclosed to the recipient by a third party having no similar confidentiality obligation. This obligation shall terminate three years after execution of this Agreement. The Company shall (i) timely file with the SEC a Current Report on Form 8-K with respect to the transactions contemplated by this Agreement and the Co-Marketing Agreement, and (ii) make such other filings and notices in the manner and time required by the SEC and the Trading Market, provided, in the case of a filing or notice described in clause (i) or (ii) above, that the information contained in such filing or notice is limited to the information necessary in order for the Company to comply with the Exchange Act and the regulations promulgated thereunder or the other applicable legal or Trading Market obligations.

4.5 Stockholder Rights Plan. No claim will be made or enforced by the Company or, to the knowledge of the Company, any other Person that the Purchaser is an “Acquiring Person” under any stockholder rights plan or similar plan or arrangement in effect or hereafter adopted by the Company, or that the Purchaser could be deemed to trigger the provisions of any such plan or

19

arrangement, by virtue of receiving Shares under the Transaction Documents. The Company shall conduct its business in a manner so that it will not become subject to the Investment Company Act.

4.6 Board Observer Rights. During the term of the Co-Marketing Agreement and provided that the Purchaser Agreement holds at least 50 percent of the Shares or Conversion Shares, the Purchaser shall have the right to designate one representative (the “Purchaser Observer Representative”), which individual shall be reasonably acceptable to the Company, who shall be entitled to attend in a non-voting capacity, in person or telephonically, all meetings of the Company’s board of directors (excluding committee meetings and executive sessions), and in connection therewith the representative shall receive advance notice of each such meeting and copies of all materials provided to the Company’s board members in connection with each such board meeting, in each case to the same extent as provided to the board members. The Purchaser may at any time and from time to time designate a Purchaser Observer Representative (which individual shall be reasonably acceptable to the Company) upon written notice to the Company. Notwithstanding the foregoing, the representative shall not be entitled to attend board meetings, or portions thereof, and shall not receive board materials, related to issues that the Company, after consultation with counsel, reasonably determines (i) is necessary to preserve the attorney-client privilege, to fulfill the Company’s obligations with respect to confidential or proprietary information of third parties or to comply with applicable law, (ii) involve potential conflicts between the interests of the Company and interests of the Purchaser, or (iii) are solely unrelated to the matters contemplated by the Co-Marketing Agreement. The Purchaser’s rights under this Section 4.6 shall be conditioned upon the Purchaser Observer Representative agreeing, by written instrument in form and substance reasonably satisfactory to the Company and the Purchaser, to treat as confidential all information provided in any meetings of the Board of Directors attended by the Purchaser Observer Representative.

4.7 Use of Proceeds. The Company shall use the net proceeds from the sale of the Shares hereunder to fund the other operations contemplated by the Co-Marketing Agreement and for working capital purposes and not for the satisfaction of any portion of the Company’s debt (other than payment of trade payables in the ordinary course of the Company’s business and prior practices), to redeem any Preferred Stock, warrants to purchase Preferred Stock, Common Stock or Common Stock Equivalents or to settle any outstanding litigation.

4.8 Reimbursement. If the Purchaser becomes involved in any capacity in any Proceeding by or against any Person who is a stockholder of the Company (except as a result of sales, pledges, margin sales and similar transactions by the Purchaser to or with any current stockholder), solely as a result of the Purchaser’s acquisition of the Shares under this Agreement, the Company will reimburse the Purchaser for its reasonable legal and other expenses (including the cost of any investigation preparation and travel in connection therewith) incurred in connection therewith, as such expenses are incurred, unless the Purchaser’s involvement is a result of a breach of such Purchaser’s representations, warranties or covenants under the Transaction Documents or any agreements or understandings the Purchaser may have with any such stockholder or any violations by the Purchaser of state or federal securities laws or any conduct by the Purchaser which constitutes fraud, gross negligence or willful misconduct). The reimbursement obligations of the Company under this paragraph shall be in addition to any liability which the Company may otherwise have, shall extend upon the same terms and

20

conditions to any Affiliates of the Purchaser who are actually named in such action, proceeding or investigation, and partners, directors, agents, employees and controlling persons (if any), as the case may be, of the Purchasers and any such Affiliate, and shall be binding upon and inure to the benefit of any successors, assigns, heirs and personal representatives of the Company, the Purchasers and any such Affiliate and any such Person. The Company also agrees that neither the Purchaser nor any such Affiliates, partners, directors, agents, employees or controlling persons shall have any liability to the Company or any Person asserting claims on behalf of or in right of the Company solely as a result of acquiring the Shares under this Agreement, except to the extent that such claims are based on a breach of any representations and warranties or covenants made by the Purchaser in Transaction Documents or any agreements or understandings the Purchaser may have with any such stockholder or any violations by the Purchaser of state or federal securities laws or any conduct by the Purchaser which constitutes fraud, gross negligence or willful misconduct.

4.9 Indemnification of Purchasers. Subject to the provisions of this Section 4.9, the Company will indemnify and hold the Purchaser and its directors, officers, stockholders, members, partners, employees and agents (each, a “Purchaser Party”) harmless from any and all losses, liabilities, obligations, claims, contingencies, damages, costs and expenses, including all judgments, amounts paid in settlements, court costs and reasonable attorneys’ fees and costs of investigation that any such Purchaser Party may suffer or incur as a result of or relating to (a) any breach of any of the representations, warranties, covenants or agreements made by the Company in this Agreement, the Registration Rights Agreement and the Certificate or (b) any action instituted against the Purchaser, or any of them or their respective Affiliates, by any stockholder of the Company who is not an Affiliate of such Purchaser, with respect to any of the transactions contemplated by the Transaction Documents (unless such action is based upon a breach of such Purchaser’s representations, warranties or covenants under the Transaction Documents or any agreements or understandings the Purchaser may have with any such stockholder or any violations by the Purchaser of state or federal securities laws or any conduct by the Purchaser which constitutes fraud, gross negligence, willful misconduct or malfeasance). If any action shall be brought against any Purchaser Party in respect of which indemnity may be sought pursuant to this Agreement, such Purchaser Party shall promptly notify the Company in writing, and the Company shall have the right to assume the defense thereof with counsel of its own choosing. Any Purchaser Party shall have the right to employ separate counsel in any such action and participate in the defense thereof, but the fees and expenses of such counsel shall be at the expense of such Purchaser Party except to the extent that (i) the employment thereof has been specifically authorized by the Company in writing, (ii) the Company has failed after a reasonable period of time to assume such defense and to employ counsel or (iii) in such action there is, in the reasonable opinion of such separate counsel, a material conflict on any material issue between the position of the Company and the position of such Purchaser Party. The Company will not be liable to any Purchaser Party under this Agreement (i) for any settlement by a Purchaser Party effected without the Company’s prior written consent, which shall not be unreasonably withheld or delayed; or (ii) to the extent, but only to the extent that a loss, claim, damage or liability is attributable to any Purchaser Party’s breach of any of the representations, warranties, covenants or agreements made by the Purchaser in this Agreement or in the Registration Rights Agreement. The Company shall not approve the settlement of any claims against a Purchaser Party without the written consent of the Purchaser Party, unless such settlement holds such Purchaser Party harmless and releases the Purchaser Party from all claims.

21

4.10 Reservation of Common Stock. The Company shall maintain a reserve, free of preemptive rights, from its duly authorized shares of Common Stock for issuance pursuant to the Transaction Documents in such amount as may be required to fulfill its obligations under the Transaction Documents in full, including the issuance of Conversion Shares.

4.11 Volume Limitations on Re-Sale. In the event that the Purchaser sells the Shares or the Conversion Shares, whether pursuant to an effective registration statement or an exemption from the registration requirements of the Securities Act, the Purchaser agrees to comply with the limitation on the amount of securities that may be sold as set forth in Rule 144(e) under the Securities Act; provided that, the Purchaser will not be required to comply with Rule 144(e) pursuant to this section in the event of (i) a public announcement of a potential Change of Control Transaction (as defined in the Co-Marketing Agreement) with respect to the Company, (ii) termination of the Co-Marketing Agreement due to a breach of such agreement by the Company, or (iii) non-extension of the Co-Marketing Agreement beyond its initial term at the Company’s discretion.

ARTICLE V.

MISCELLANEOUS

5.1 Termination. This Agreement may be terminated by the Purchaser by written notice to the Company, if the Closing has not been consummated on or before April 30, 2007.

5.2 Fees and Expenses. Except as expressly set forth in the Transaction Documents to the contrary, each party shall pay the fees and expenses of its advisers, counsel, accountants and other experts, if any, and all other expenses incurred by such party incident to the negotiation, preparation, execution, delivery and performance of this Agreement. The Company shall pay all transfer agent fees, stamp taxes and other taxes and duties levied in connection with the delivery of any Shares.

5.3 Entire Agreement. The Transaction Documents, together with the exhibits and schedules thereto, contain the entire understanding of the parties with respect to the subject matter hereof and supersede all prior agreements and understandings, oral or written, with respect to such matters, which the parties acknowledge have been merged into such documents, exhibits and schedules.

5.4 Notices. Any and all notices or other communications or deliveries required or permitted to be provided hereunder shall be in writing and shall be deemed given and effective on the earliest of (a) the date of transmission, if such notice or communication is delivered via facsimile at the facsimile number set forth on the signature pages attached hereto prior to 5:30 p.m. (Eastern Time) on a Trading Day, (b) the next Trading Day after the date of transmission, if such notice or communication is delivered via facsimile at the facsimile number set forth on the signature pages attached hereto on a day that is not a Trading Day or later than 5:30 p.m. (Eastern Time) on any Trading Day, (c) the 2^nd Trading Day following the date of mailing, if sent by U.S. nationally recognized overnight courier service, or (d) upon actual receipt by the party to whom such notice is required to be given. The address for such notices and communications shall be as set forth on the signature pages attached hereto until changed by notice given in accordance with this Section.

22

5.5 Amendments; Waivers. No provision of this Agreement may be waived or amended except in a written instrument signed, in the case of an amendment, by the Company and the Purchaser or, in the case of a waiver, by the party against whom enforcement of any such waiver is sought. No waiver of any default with respect to any provision, condition or requirement of this Agreement shall be deemed to be a continuing waiver in the future or a waiver of any subsequent default or a waiver of any other provision, condition or requirement hereof, nor shall any delay or omission of either party to exercise any right hereunder in any manner impair the exercise of any such right.

5.6 Headings. The headings herein are for convenience only, do not constitute a part of this Agreement and shall not be deemed to limit or affect any of the provisions hereof. The language used in this Agreement will be deemed to be the language chosen by the parties to express their mutual intent, and no rules of strict construction will be applied against any party.

5.7 Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the parties and their successors and permitted assigns. The Company may not assign this Agreement or any rights or obligations hereunder without the prior written consent of the Purchaser. Other than the Purchaser’s right to designate the Purchaser Observer Representative pursuant to Section 4.6 (which right shall not be assigned by the Purchaser without the prior written consent of the Company), the Purchaser may assign any or all of its rights under this Agreement to any Person to whom such Purchaser assigns or transfers any Shares, provided such transferee agrees in writing to be bound, with respect to the transferred Shares, by the provisions hereof that apply to the “Purchaser.”

5.8 No Third-Party Beneficiaries. This Agreement is intended for the benefit of the parties hereto and their respective successors and permitted assigns and is not for the benefit of, nor may any provision hereof be enforced by, any other Person, except as otherwise set forth in Section 4.9.

5.9 Governing Law. All questions concerning the construction, validity, enforcement and interpretation of the Transaction Documents shall be governed by and construed and enforced in accordance with the internal laws of the State of New York, without regard to the principles of conflicts of law thereof, except to the extent that the application of the General Corporation Law of the State of Delaware is mandatorily applicable. Each party agrees that all legal proceedings concerning the interpretations, enforcement and defense of the transactions contemplated by this Agreement and any other Transaction Documents (whether brought against a party hereto or its respective affiliates, directors, officers, stockholders, employees or agents) shall be commenced exclusively in the state and federal courts located in Xxxxxx County or Hennepin County, Minnesota, U.S.A. or in Suffolk County or Middlesex County, Massachusetts, U.S.A. Each party hereto hereby irrevocably submits to the exclusive jurisdiction of the state and federal courts located in Xxxxxx County or Hennepin County, Minnesota, U.S.A. or in Suffolk County or Middlesex County, Massachusetts, U.S.A. for the adjudication of any dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein (including with respect to the enforcement of any of the Transaction Documents), and hereby irrevocably waives, and agrees not to assert in any suit, action or proceeding, any claim that it is not personally subject to the jurisdiction of any such court, that such suit, action or proceeding has been commenced in an improper or inconvenient venue for such proceeding. Each party hereto

23

hereby irrevocably waives personal service of process and consents to process being served in any such suit, action or proceeding by mailing a copy thereof via registered or certified mail or overnight delivery (with evidence of delivery) to such party at the address in effect for notices to it under this Agreement and agrees that such service shall constitute good and sufficient service of process and notice thereof. Nothing contained herein shall be deemed to limit in any way any right to serve process in any manner permitted by law. Each party hereto hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Agreement or the transactions contemplated hereby. If either party shall commence an action or proceeding to enforce any provisions of the Transaction Documents, then the prevailing party in such action or proceeding shall be reimbursed by the other party for its reasonable attorneys’ fees and other costs and expenses incurred with the investigation, preparation and prosecution of such action or proceeding.

5.10 Survival. The representations, warranties, agreements and covenants contained herein shall survive the Closing and the delivery of the Shares and Conversion Shares.

5.11 Execution. This Agreement may be executed in two or more counterparts, all of which when taken together shall be considered one and the same agreement and shall become effective when counterparts have been signed by each party and delivered to the other party, it being understood that both parties need not sign the same counterpart. In the event that any signature is delivered by facsimile transmission, such signature shall create a valid and binding obligation of the party executing (or on whose behalf such signature is executed) with the same force and effect as if such facsimile signature page were an original thereof.

5.12 Severability. If any provision of this Agreement is held to be invalid or unenforceable in any respect, the validity and enforceability of the remaining terms and provisions of this Agreement shall not in any way be affected or impaired thereby and the parties will attempt to agree upon a valid and enforceable provision that is a reasonable substitute therefore, and upon so agreeing, shall incorporate such substitute provision in this Agreement.

5.13 Replacement of Shares. If any certificate or instrument evidencing any Shares is mutilated, lost, stolen or destroyed, the Company shall issue or cause to be issued in exchange and substitution for and upon cancellation thereof, or in lieu of and substitution therefore, a new certificate or instrument, but only upon receipt of evidence reasonably satisfactory to the Company of such loss, theft or destruction and customary and reasonable indemnity, if requested. The applicants for a new certificate or instrument under such circumstances shall also pay any reasonable third-party costs associated with the issuance of such replacement Shares. If a replacement certificate or instrument evidencing any Shares is requested due to a mutilation thereof, the Company may require delivery of such mutilated certificate or instrument as a condition precedent to any issuance of a replacement.

5.14 Remedies. In addition to being entitled to exercise all rights provided herein or granted by law, including recovery of damages, each of the Purchaser and the Company will be entitled to specific performance under the Transaction Documents. The parties agree that monetary damages may not be adequate compensation for any loss incurred by reason of any breach of obligations described in the foregoing sentence and hereby agrees to waive in any action for specific performance of any such obligation the defense that a remedy at law would be adequate.

24

5.15 Payment Set Aside. To the extent that the Company makes a payment or payments to the Purchaser pursuant to any Transaction Document or a Purchaser enforces or exercises its rights thereunder, and such payment or payments or the proceeds of such enforcement or exercise or any part thereof are subsequently invalidated, declared to be fraudulent or preferential, set aside, recovered from, disgorged by or are required to be refunded, repaid or otherwise restored to the Company, a trustee, receiver or any other person under any law (including, without limitation, any bankruptcy law, state or federal law, common law or equitable cause of action), then to the extent of any such restoration the obligation or part thereof originally intended to be satisfied shall be revived and continued in full force and effect as if such payment had not been made or such enforcement or setoff had not occurred.

(Signature Pages Follow)

25

IN WITNESS WHEREOF, the parties hereto have caused this Securities Purchase Agreement to be duly executed by their respective authorized signatories as of the date first indicated above.

Cambridge Heart, Inc.				Address for Notice:
By:		/s/ Xxxxxx X. Xxxxxxxxx		0 Xxx Xxxx Xxxxx Xxxxxxx, XX 00000
Name:		Xxxxxx X. Xxxxxxxxx
Title:		President and Chief Executive Officer
With a copy to: Xxxxxx XxXxxxxxx & Fish LLP 000 Xxxxxxx Xxxxxxxxx Xxxxxx, XX 00000 Attn. Xxxxxxxx X. Xxxxx

St. Jude Medical, Inc.				Address for Notice:
By:		/s/ Xxxx X. Xxxxxxxxxx		Xxx Xxxxxxxx Xxxxx Xx. Xxxx, XX 00000-0000
Name:		Xxxx X. Xxxxxxxxxx
Title:		Executive Vice President & CFO

With a copy to:

Xxxxxx & Xxxxxxx LLP

00 Xxxxx Xxxxx Xxxxxx

Xxxxxxxxxxx, XX 00000

Attn. Xxxxxxxx X. Xxxxx

26