JOINT FILING AGREEMENT
The undersigned hereby agree that the Statement on Schedule
13G, dated November 23, 1998, (the "Schedule 13G"), with respect to the Common
Stock, no par value, of Thoratec Laboratories Corporation is, and any amendments
thereto executed by each of us shall be, filed on behalf of each of us pursuant
to and in accordance with the provisions of Rule 13d-1(k)(1)(iii) under the
Securities and Exchange Act of 1934, as amended, and that this Agreement shall
be included as an Exhibit to the Schedule 13G. Each of the undersigned agrees to
be responsible for the timely filing of the Schedule 13G and any amendments
thereto, and for the completeness and accuracy of the information concerning
itself contained therein. This Agreement may be executed in any number of
counterparts, all of which taken together shall constitute one and the same
instrument.
IN WITNESS WHEREOF, the undersigned have executed this
Agreement as of the 23rd day of November, 1998.
XXXXXX XX
By: /s/ Xxxxx Xxxxx
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Name: Xxxxx Xxxxx
Title: Deputy Vice President and General Counsel,
Head of Legal Department
SULZER MEDICA LTD.
By: /s/ Xxxxx Xxxxxx
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Name: Xxxxx Xxxxxx
Title: President and Chief Executive Office
SULZER MEDICA USA INC.
By: /s/ Xxxxx X. Xxxx
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Name: Xxxxx X. Xxxx
Title: Group Vice President, General Counsel and
Secretary