An abdominal aortic aneurysm (AAA) is defined as a permanent dilation of the abdominal aorta, with a diameter greater than 5 cm or a diameter greater than 50% of the aortic diameter at the level of the diaphragm. If left untreated, progressive vessel wall degeneration leads to dilation and thinning of the vessel. Eventually, these changes can result in the rupture of the AAA.

AAA relies on two different surgical methods: Open surgical repair of AAA (A) and Endovascular placement of an aortic stent graft (B).