This test is an ultrasound of the aorta, one of the large arteries in the abdomen. It is done in the office by a trained sonographer (ultrasound technologist). The ultrasound uses sound waves to see if there is an abdominal aortic aneurysm (AAA). An abdominal aortic aneurysm is an enlargement or weakening of the walls of the aorta. An abdominal aortic aneurysm does not usually cause symptoms until it becomes an emergency. As a result, this screening test may be done if you have a history of coronary artery disease (hardening or blockages of the heart arteries) or peripheral artery disease (hardening or blockages of the arteries of the legs or neck). This is also recommended as a screening for men, aged 65-­75, who smoke or have previously smoked.