Endovascular aneurysm repair (EVAR) is a minimally invasive procedure used to treat an abdominal aortic aneurysm (AAA)—a bulging or weakened section in the lower part of the aorta. Without treatment, an aneurysm may enlarge and eventually rupture, which can be life-threatening.

EVAR involves inserting a stent graft—a fabric-covered metal tube—into the aorta through small incisions in the groin. The stent graft is guided to the aneurysm using fluoroscopic (X-ray) imaging and deployed to reinforce the artery wall and redirect blood flow, effectively sealing off the aneurysm from within.