Zenith® Dissection Clinical Trial

Exclusion Criteria:

1. Age < 18 years;

2. Other medical condition (e.g., cancer, congestive heart failure) that may cause the
patient to be non-compliant with the Clinical Investigation Plan, confound the
results, or is associated with limited life expectancy (i.e., less than 2 years);

3. Pregnant, breast-feeding, or planning on becoming pregnant within 60 months;

4. Unwilling or unable to comply with the follow-up schedule;

5. Inability or refusal to give informed consent;

6. Simultaneously participating in another investigative device or drug study. (The
patient must have completed the primary endpoint of any previous study at least 30
days prior to enrollment in this study.);

7. Additional medical restrictions as specified in the Clinical Investigation Plan; or

8. Additional anatomical restrictions as specified in the Clinical Investigation Plan.