The aorta is the body's largest artery. It carries blood from the heart and delivers it to the rest of the body. The aorta travels through the chest and the abdomen. An aortic aneurysm is a weak, bulging area in the wall of the aorta. The bulging develops from a weakness or defect in the aortic wall. It tends to get bigger with time.
The greatest danger is that an aneurysm will rupture. This will cause heavy, uncontrollable bleeding. Aortic aneurysms can also occur with aortic dissection. Dissection is a small tear in the aortic wall. Blood from the aneurysm can leak through this tear and spread between the layers of the aortic wall. This leads to eventual rupture of the vessel.
Aneurysms can develop anywhere. They are most common in the aorta, iliac artery, and femoral artery.
is frequently associated with aneurysm. However, it is not thought that this disease alone causes the growth of an aneurysm. It is believed that other factors, such as
high blood pressure
or connective tissue disorders, must be present for an aneurysm to form.
The doctor will ask about your symptoms and medical history. A physical exam will be done. Pain is the symptom that will most likely cause you to go to the doctor. Most aortic aneurysms are discovered during a routine physical exam.
Your doctor may need pictures of your heart. This can be done with:
Surgery to repair an aortic aneurysm is called
aneurysmectomy. It involves removing the portion of the aorta that contains the aneurysm and replacing it with a mesh graft.
With aneurysms of the thoracic aorta, the aortic valve may also be affected and need to be replaced or repaired. If the aneurysm involves important branches of the aorta, these vessels may either be repaired or bypassed.
When deciding whether to operate, the doctor will consider:
Depending on where the aneurysm is located and how complex it is, stenting may be done. A stent-graft is a polyester tube covered by a tubular metal web. The stent-graft is inserted into the aorta. With the stent-graft in place, blood flows through the stent-graft instead of into the aneurysm, eliminating the chance of rupture.
The US Preventive Services Task Force recommends that men aged 65-75 who have ever smoked be screened once for abdominal aortic aneurysm with
ultrasound. This is a painless procedure that gives a picture of the abdomen using sound waves. Early detection of abdominal aortic aneurysm in this group has been shown to reduce mortality from this condition.
Abdominal aortic aneurysm (AAA). EBSCO DynaMed website. Available at: ...(Click grey area to select URL) Updated April 18, 2013. Accessed May 8, 2013.
Heart Disease: A Textbook of Cardiovascular Medicine. 6th ed. Philadelphia, PA: WB Saunders Company; 2001.
Sabiston DC, Townsend CM.
Sabiston Textbook of Surgery. 16th ed. Philadelphia, PA: WB Saunders Company; 2001.
Screening for abdominal aortic aneurysm: recommendation statement. US Preventive Services Task Force website. Available at: ...(Click grey area to select URL) Published February 2005. Accessed May 8, 2013.
Thoracic aortic aneurysm (AAA). EBSCO DynaMed website. Available at: ...(Click grey area to select URL) Updated April 16, 2013. Accessed May 8, 2013.
7/21/2009 DynaMed's Systematic Literature Surveillance ...(Click grey area to select URL) Thompson SG, Ashton HA, Gao L, Scott RA, Multicentre Aneurysm Screening Study Group. Screening men for abdominal aortic aneurysm: 10 year mortality and cost effectiveness results from the randomised Multicentre Aneurysm Screening Study. BMJ. 2009;338:b2307.