An abdominal aneurysm is a localized widening (dilatation) of an artery or vein (usually artery) in the abdomen. At the area of an aneurysm, there is typically a bulge and the wall is weakened and may rupture. This event is far more serious when it involves an artery due to the much higher pressure in the arterial system. The word ”aneurysm“ comes from the Greek aneurysma meaning ”a widening.“ An abdominal aneurysm is situated within the abdomen, usually involving the abdominal aorta, the large vessel coming directly from the heart. The full term for his condition is ”abdominal aortic aneurysm.“ Because of the volume of blood flowing under relatively high pressure within the aorta, a ruptured aneurysm of the aorta is a catastrophe usually resulting in death and if discovered before this kind of catestrophic event should almost always be surgically repaired. Most such aneuysms are of atherosclerotic origin, although they can also be congenital.