EXHIBIT 99.1 AMENDMENT TO RIGHTS AGREEMENT AMENDMENT, dated as of July 22, 1997, to the Rights Agreement, dated as of May 22, 1995 (the "Rights Agreement"), between Healthdyne Technologies, Inc., a Georgia corporation (the "Company"), and SunTrust...Rights Agreement • July 30th, 1997 • Healthdyne Technologies Inc • Surgical & medical instruments & apparatus
