Abdominal Aortic Aneurysms (AAA) By Mark A Farber, MD, FACS, University of North Carolina; Federico E Parodi, MD, University of North Carolina School of Medicine Reviewed / Revised Jun 2022 | Modified Sep 2022 View Patient Education Etiology Symptoms and Signs Diagnosis Treatment Key Points Topic Resources Mean Vascular Pressure (systemic... Abdominal Aortic Aneurysm... Abdominal Aortic Aneurysm... Abdominal Aortic Pseudoaneurysm... Abdominal Aortic Aneurysm... Abdominal aortic diameter ≥ 3 cm typically constitutes an abdominal aortic aneurysm.