When are aortic aneurysm repairs performed?

Based on size: The risk of rupture of an aortic aneurysm increases with its size (diameter). When the size reaches a certain threshold, the risk of rupture becomes substantial. At this point, a repair is justified either with surgery or a percutaneous stent graft.

Depends on location: Ifrarenal aorta 5cm or increase of 0.5cm or more over 6mo once twice native aorta. 6cm for ascending aorta or >=4.5 cm with bicuspid aortic valve or aortic insufficiency, marfan's, ehrles danlos syndrome. 6cm for descending thoracic aorta, thoracoabdominal aorta. These are for asymptomatic aneurysms. Earlier intervention may be warranted if clinically indicated.