The aorta is your largest blood vessel, delivering oxygenated blood from your heart to the rest of your body.
The wall of your aorta can develop a bulge, or weakened area, that can be at risk for rupture or separation. Over time, the bulge can grow larger and become weaker.
A burst aorta results in life-threatening internal bleeding and death if not treated quickly.
Aortic aneurysms most often occur in the section of the aorta that runs through your abdomen, so they are called abdominal aortic aneurysms, or AAAs. However, thoracic aortic aneurysms can occur in the section of the aorta that runs through your chest.