Elderly abdominal aortic aneurysm

Abdominal aortic aneurysm refers to aneurysmal dilation of the abdominal aorta, typically defined as an aneurysm when the diameter increases by more than 50%. Abdominal aortic aneurysms are more common in elderly males, with a male-to-female ratio of 10:3, especially in smokers, and smoking also significantly increases the risk of aneurysm rupture. The vast majority of abdominal aortic aneurysms are lesions below the level of the renal arteries.