ANDERS PERSSON, CMIV / SCIENCE PHOTO LIBRARY ANDERS PERSSON, CMIV / SCIENCE PHOTO LIBRARY
Aortic aneurysm stent. Computed tomography (CT) scan of a human torso, showing a mesh stent (lower right) used to treat a large swelling (aneurysm) in the abdominal aorta. The aorta is the body's main artery. It arches over the heart and descends to the abdomen. The lungs and ribs and pelvis bones are also shown. An aneurysm is a weakening of the walls of a blood vessel, leading to swelling and rupture. In the aorta, such rupturing is swiftly fatal. Surgery is needed before a rupture to repair the aorta and implant a stent to strengthen its walls.
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