Ruptured abdominal aortic aneurysms are the 15th leading cause of death in the United States and the 10th leading cause of death in men older than 55 [1]. For decades, the standard treatment for abdominal aortic aneurysms has been open surgery. Many investigators have worked to develop a less invasive treatment based on stents, which has been used to treat arterial stenoses. In 1991 Parodi et al. [2] reported the first series of patients with abdominal aortic aneurysms treated with stent-grafts (covered stents). Endovascular repair was first offered to patients with significant comorbid conditions, who were at high risk for open surgical repair 3]. Now endovascular repair is being offered to many patients, regardless of their comorbidities.