A complex abdominal aortic aneurysm is an abnormal ballooning of the wall of the aorta, the main artery supplying blood to the lower part of the body. This specific type of aneurysm is referred to as the “silent killer” since symptoms are often not present and if it ruptures, it often leads to death. Vascular surgeon, Dr. Wang Teng, discusses the causes and symptoms of a Complex Abdominal Aortic Aneurysm, as well as treatment using a fenestrated endovascular stent graft. Dr. Teng is one of few vascular surgeons in the nation trained to use the fenestrated endovascular stent graft, and was the first to perform the surgery in Southern California in January 2013.