Abdominal aortic aneurysm repair is needed to prevent the rupture of the abdominal aorta which is a large artery that carries blood away from the heart to the lower part of the body. When the aorta becomes weak, an aneurysm can suddenly rupture or break. Surgery is performed to prevent the rupture from happening and to avoid loss of blood. The surgeon opens the abdomen and repairs it using a graft that looks much like a hollow tube. The weakened area is strengthened.