An aortic aneurysm is an abnormal enlargement of the wall of the aorta, the main blood vessel of the body (which transports blood from the heart to other places). On April 18, 1955, Albert Einstein, one of the greatest scientists in the history of mankind, died in Princeton, USA, of a ruptured aortic aneurysm. Types of aortic aneurysms can be categorized as either spindle-shaped or sac-shaped depending on their shape. Aortic aneurysms can be classified according to their location: Abdominal aortic aneurysm: occurs in the abdominal part of the aorta. The abdominal aorta is the main artery of the abdomen. Clogged aneurysm: or aortic coarctation, occurs when the intima of the aorta tears and blood enters under the intima and tears the aortic wall, making the arterial wall weak and unable to withstand the high pressure of the artery and prone to rupture. Thoracic aortic aneurysm: occurs in the thoracic aorta, which is the aorta in the thoracic cavity.