Abdominal aortic aneurysm.
An abdominal aortic aneurysm is a bulge in the belly part of the aorta. The aorta is one of the body’s main arteries. It carries oxygen-rich blood form heart to the rest of the body. The abdominal aorta carries blood to the lower body. The wall of the aorta is normally very elastic. It can stretch and them shrink back as needed to adapt to blood flow. But some medical problems, such as high blood pressure and atherosclerosis (hardening of the arteries), weaken the artery walls. These problem, along with the wear and tear that naturally occurs with aging, can result in a weak aortic wall that bulges outward.