An aortic aneurysm is a bulge or dilatation in a section of the aorta, the body’s main arterywhich carries oxygen-rich blood from the heart to the rest of the body. Because the section with the aneurysm is overstretched and weak, it can burst. If the aorta bursts, it can cause serious bleeding that can quickly lead to death.
Aneurysms can form in any section of the aorta, but they are most common in the abdominal part. They can also happen in the upper thoracic aorta. Thoracic aortic aneurysms are also known as ascending or descending aortic aneurysms.