The aorta is the main artery in the human body that carries oxygenated blood from the heart to the rest of the body. When a bulge forms in any part of the aorta it is called an aortic aneurysm. This poses a grave risk, because if the bulge ruptures due to increased pressure of blood flowing within, it can cause internal bleeding and other problems. An aneurysm repair may be done through open heart method by making an incision in the chest and replacing the damaged part with a graft. In recent times, the more advanced method of endovascular repair is used, wherein the surgeon inserts a catheter (thin tube-like device) upwards from the thigh area into the aneurysm, while using imaging to watch the process on a computer monitor. Using the catheter, a stent graft is inserted to strengthen the aorta and prevent rupture.