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An aneurysm (AN-u-rism) is a balloon-like bulge in an artery. Arteries are blood vessels that carry oxygen-rich blood to your body. Arteries have thick walls to withstand normal blood pressure.However, certain medical problems, genetic conditions, and trauma can damage or injure artery walls.n aneurysm can grow large and rupture (burst) or dissect. A rupture causes dangerous bleeding inside the body. A dissection is a split in one or more layers of the artery wall. The split causes bleeding into and along the layers of the artery wall. Both rupture and dissection often are fatal.
An aneurysm is a dilatation-or a bulging ballooning out-of the walls of an artery. An aortic aneurysm is bulging out of the walls of the aorta, which is the largest artery in the body and carries oxygen-rich blood from the heart to the rest of the body.he surgery to repair aortic aneurysms carries a small but real risk. (This risk varies based on the patientâs age, the patientâs overall health condition, the location and extent of the aneurysm and the volume of aortic procedures performed by the surgeon and at the center where the surgery is performed).