An abdominal aortic aneurysm occurs when the major blood vessel supplying blood to the abdomen, pelvis, and legs becomes abnormally large or bulges outward. A potential complication of abdominal aortic aneurysm is that of the blood vessel tearing open. Each year in the United States, 45,000 people with unruptured abdominal aortic aneurysm undergo elective repair. Endovascular repair is a less invasive method of fixing abdominal aortic aneurysm than open repair, but short-term outcomes of endovascular repair are not well-studied.
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