Bulging can occur in any artery in the body. It is most common in the arteries of the brain and in the abdominal aorta. 1  In the aorta, bulging can occur anywhere along the entire vessel.2  It is most common in the abdominal aorta, where it is known as abdominal aortic aneurysm (triple AAA).he aorta is an artery, meaning it carries oxygen-rich blood from the heart. It is the main artery coming from the heart. 1  It extends from the left chamber (ventricle) of the heart and goes through the chest, down through the belly, or midsection of the body (abdomen), and into the pelvis (groin).