Contract

EXHIBIT 10.52.1

Each of the executive officers of Micro Therapeutics, Inc. identified in the table below is party to a letter agreement with Micro Therapeutics, Inc. and ev3 Inc. in substantially the form attached as Exhibit 10.52. Each letter agreement is identical except for such executive officer’s title, which is set forth in the table below.

Name of Executive		Title
Xxxx Xxxx		Vice President, Research and Development
Xxxxxxx Xxxxxx		Vice President, Operations
Xxx Xxxxxxx		Vice President, Clinical, Regulatory, Quality Assurance
Xxxxxx Xxxxxxx		Vice President, Sales and Marketing