What are the stages of an Abdominal Aortic Aneurysm?

AAA’s begin at different sizes, grow at different rates and can be symptomatic, or asymptomatic, so it is difficult to neatly put an AAA into clear stages. In saying this, all AAA’s begin with a weakening of the aortic wall in the abdomen area. The weakened point may then grow into a larger, unstable area. At this point the aneurysm will bulge under the internal pressure of the blood flowing through the aorta. Onwards, the aneurysm can either withstand the pressure difference relatively easily, or it may worsen, and possibly result in a rupture. This process can be very quick (instant), or very slow (over years).

Considering these factors, a regular ultrasound for AAA is recommended, especially if you fall into one of the higher risk groups mentioned above, in ‘What causes an Abdominal Aortic Aneurysm?’

AAA’s are usually treated once they are larger than 5cm in diameter.

Asymptomatic aneurysms under 5cm in size are usually monitored with regular ultrasound and/or CT angiograms with reviews from a vascular surgeon.