AAA is a localized widening and weakening of the abdominal aorta, and primarily affects elderly Caucasian men who smoke, have high blood pressure and high cholesterol levels.

AAA可引起腹主动脉的局部扩张和弱化，其主要影响人群为吸烟的，有高血压和高胆固醇水平的老年高加索人。