An aneurysm is an abnormal widening or ballooning of a portion of an artery due to weakness in the wall of the blood vessel.
- Abdominal aortic aneurysm
- Cerebral aneurysm
- Thoracic aortic aneurysm
It is not clear exactly what causes aneurysms. Some aneurysms are present at birth (congenital). Defects in some of the parts of the artery wall may be responsible.
Common locations for aneurysms include:
- The major artery from the heart (the aorta)
- The brain (cerebral aneurysm)
- In the leg behind the knee popliteal artery aneurysm)
- Intestine (mesenteric artery aneurysm)
- An artery in the spleen (Splenic artery aneurysm)
High blood pressure and high cholesterol may raise your risk of certain types of aneurysms. High blood pressure is thought to play a role in abdominal aortic aneurysms. Atherosclerotic disease (cholesterol buildup in arteries) may also lead to the formation of some aneurysms.
Pregnancy is often linked to the formation and rupture of splenic artery aneurysms.
The symptoms depend on the location of the aneurysm. If the aneurysm occurs near the body's surface, pain and swelling with a throbbing mass is often seen.
Aneurysms within the body or brain often cause no symptoms.
If an aneurysm ruptures, low blood pressure, high heart rate, and lightheadedness may occur. The risk of death after a rupture is high.
Surgery is generally recommended. The type of surgery and when you need it depends on your symptoms and the size and type of aneurysm.
Some patients may have endovascular stent repair. A stent is a tiny tube used to prop open a vessel or reinforce it's wall. . This procedure can be done without a major cut, so you recover faster than you would with open surgery. Not all patients with aneurysms are candidates for stenting, however. See: Endovascular embolization
With successful surgical repair, the outlook is often excellent.
Control of high blood pressure may help prevent some aneurysms. Following a healthy diet, getting regular exercise, and keeping your cholesterol at a healthy level may also help prevent aneurysms or their complications.