An endovascular stent graft is a metal-lined fabric tube that reinforces an aneurysm in a blood vessel. It is a way to reline the blood vessel and decrease the chance of an aneurysm rupturing. The stent graft seals tightly above and below the aneurysm. The graft is stronger than the weakened artery and allows blood to pass through it without pushing on the bulge. Endovascular stent grafting can be used to treat abdominal aortic aneurysms (AAAs), as well as thoracic aortic aneurysms (TAAs).

To perform endovascular procedures, vascular surgeons and interventional radiologists use wires and catheters inside the blood vessels. Theses catheters can be placed in the blood vessels in the legs, meaning that only two small incisions are required.

Generally, endovascular treatments allow you to leave the hospital sooner and recover more quickly, with less pain and a lower risk of complications and death than traditional surgery, because the incisions are smaller. Sometimes traditional surgery is required, however, if the shape or the location of the aneurysm is not favorable for an endovascular treatment.