An abdominal aortic aneurysm (AAA) is usually a bulge within the aorta from the abdomen. The aorta is the main artery that carries blood far from the heart to other aspects of the body. Coronary artery disease (CAD): Disease from the arteries in the center can predispose to blood clots, https://www.sgvascularctr.com/introduction-to-vascular-diseases/