Medtronic HAMMOCK Post Approval Study

Inclusion Criteria:

1. Subjects who require aortic or mitral valve replacement of their native valve.

2. Subject is geographically stable and willing to return to the implanting site for all
follow-up visits.

3. Subject is of legal age to provide informed consent in the country where they enroll
in the study.

4. Subject has been adequately informed of risks and requirements of the study and is
willing and able to provide informed consent for participation in the clinical study.

Exclusion Criteria:

1. Subject requires concomitant replacement of the aortic and mitral valves.

2. Subject requires a replacement of a previously implanted prosthetic aortic or mitral
valve.

3. Subject requires a Bentall procedure for replacement of aortic valve or aortic root.