To collect and analyze clinical follow-up data which can be used to assess the safety, efficacy, and durability of endovascular AAA repair with Zenith and Chuter-Gianturco stent-grafts.

We propose to analyze the data collected for clinical purposes in 453 patients who already underwent endovascular AAA repair at UCSF and SFVA, and others who will undergo this operation in the future. Most of these patients have now passed the 2-year follow-up required by the original protocol, all continue to be followed for clinical purposes, using the same studies, the same data forms and the same schedule as before, because studies of various devices of this type have shown that the potential for late problems requires continuing scrutiny of stent-graft structure and function, as a basis for timely re-intervention.

Inclusion Criteria:

• AAA with diameter > 4 cm or AAA with a history of growth > 0.5 cm per year
• treatment of AAA with Zenith Stent-Graft

Exclusion Criteria:

• Pregnant
• Life expectancy less than two years
• Less than 18 years of age
• Unwilling to comply with clinical follow-up schedule
• Inability or refusal to give informed consent

Patients with Abdominal Aortic Aneurysms treated with Zenith Stent-Graft