The bulge generally occurs in a weak area in the wall. Although aneurysms can develop anywhere along the aorta, three quarters of them develop in the segment that runs through the abdomen. Most are fusiform. High blood pressure and cigarette smoking increase the risk of an aneurysm. Aneurysms also can develop in arteries other than the aorta.
Infection usually starts elsewhere in the body, typically in a heart valve.
Treatment often involves surgical repair, which is very risky. Abdominal Aortic Aneurysms Aneurysms in the segment of the aorta that passes through the abdomen tend to run in families. Many times, these aneurysms occur in people with high blood pressure. Such aneurysms often become larger than 3 inches and may rupture. A person with an abdominal aortic aneurysm often becomes aware of a pulsing sensation in the abdomen.