An abdominal aortic aneurysm (AAA) is a balloon-like bulge in your aorta. It affects the part of your aorta that runs through your abdomen. Your aorta is your body’s main artery. Is an AAA Serious?

The aorta is the main blood vessel that carries oxygen-filled blood from the heart to the rest of the body. It extends from the chest to the abdomen, where it branches (bifurcates) into the iliac ...