Aorta is the main artery of the body, it is the largest one carrying the most blood. An aneurysm is a weakening of the wall of an artery which results in a bulging. The aneurysm can rupture in which case the person dies quickly from internal bleeding. It needs to be dealt with immediately. Surgical repair of the weakened aorta is necessary, and minimally invasive procedures make repair of this defect easier on the patient.
Aortic anurysims can be caused by genetic factors that result in weakened walls of the blood vessel. Atherosclerotic plaques (hardening of the arteries) plays a role in weakening the arteries as well.