The purpose of this study is to evaluate the clinical performance of the Zenith Alpha™ Abdominal Endovascular Graft for the treatment of abdominal aortic or aorto-iliac aneurysm.

Inclusion Criteria:

• A patient is considered eligible for inclusion in the study if the patient has an infrarenal abdominal aortic or aorto-iliac aneurysm and is intended to be treated with the Zenith Alpha™ Abdominal Endovascular Graft

Exclusion Criteria:

• Life expectancy less than (<) 2 years
• Inability or refusal to give informed consent by the patient or legally authorized representative
• Unwilling or unable to comply with the study follow-up

Potential study patients with abdominal aortic or aorto-iliac aneurysm will be "screened " at the hospital.