Abdominal and Iliac Aortic Aneurysm

abdominal aortic aneurysm

Abdominal aortic aneurysm.

What is abdominal aortic aneurysm (AAA)?

An abdominal aortic aneurysm is a condition that occurs when part of the aorta becomes enlarged. Normally the abdominal aorta is a round circular structure that resembles a pipe, roughly the size of a golf ball. When an aneurysm develops, the aorta expands and its walls become weaker, similar to an expanding balloon. This enlargement puts the aorta at risk for rupturing, which can be like threatening if not treated immediately.

What is an iliac aneurysm (IAA)?

The iliac artery branches off from abdominal aorta into the lower part of the pelvis that directs blood flow to the legs. With an iliac aneurysm, the wall of the iliac artery can expand and weaken, which puts it at risk for bursting. If this happens, it is a life-threatening condition that requires immediate medical attention. It is very common to have iliac aneurysms associated with an aortic aneurysm.

Risk Factors for Abdominal Aortic and Iliac Aneurysms

Though people can experience stomach, back or groin pain to signify a possible aneurysm, often those symptoms are felt only when the aneurysm is close to rupturing and requires immediate emergency care. The best way to prevent a fatal abdominal or iliac aneurysm rupture starts with knowing what risk factors apply to you and how to take active steps to decrease your chances of an aneurysm. Common risk factors include:

  • Age: Greater than 50
  • Gender: Aortic aneurysms impact men more than women
  • Family history: It has been shown that there are higher incidences of aortic disease if one or more family members have been previously diagnosed
  • Genetic factors: Certain collagen vascular disorders, such as Marfan Syndrome, Loey-Deitz Syndrome and Vascular Ehlers-Danlos Syndrome, lead to a higher risk of developing aortic disease
  • Preexisting aneurysm: A previous aneurysm increases your chances of additional aneurysms
  • Lifestyle Threats: The following comorbidities increase the likelihood of you having aortic disease:
    • Smoking
    • High blood pressure
    • High cholesterol
    • Diabetes

Prevention for Abdominal/Iliac Aorta Aneurysms

Once you know you are at risk for abdominal aortic and iliac aneurysm, prevention is the most effective way to decrease your changes of having a serious condition. The best methods of prevention are smoking cessation and well-controlled blood pressure. Reasonable physical activity is okay after an aneurysm has been diagnosed.

Ultrasound Scan

If you have a family history of aortic aneurysm, you and the other members of your family are at a higher risk of an abdominal or iliac aneurysm. An ultrasound, a painless, non-invasive, radiation-free test, is the best screening tool for detecting aortic aneurysms. Ultrasound allows us to see and measure the aorta and iliac arteries in great detail, and identify an existing aneurysm so we know how to prevent further complications.

Lifestyle Management

Leading a healthy, or healthier, lifestyle can dramatically reduce your risk of aortic aneurysm. Having regular exams to monitoring your cholesterol and blood pressure can lower your chances of having a severe an aortic aneurysm.

For those who smoke, making the effort to stop smoking is critical for long-term aneurysm prevention. You should also consider joining smoking cessation groups designed to help at-risk patients quit smoking.

Abdominal/Iliac Aortic Aneurysm Treatment Options

UChicago Medicine offers a full range of medical and surgical therapies to treat abdominal and iliac aortic aneurysms with treatment plan focused on our patient’s specific condition. Our approach to personalized care looks beyond just the disease itself to create a plan that centers around your diagnosis, risk factors, size (5 cm in women and 5.5 cm in men), shape and severity of the dissection to deliver safe, effective, customized treatment. Common treatments may include one or more of the following:

  • Controlling or modifying risk factors: Quit smoking, control blood pressure, manage blood sugar is diabetic/pre-diabetic to help slow the progression of the aneurysm
  • Observation: Routine ultrasound can monitor the size and rate of growth of the aneurysm. A CT scan is frequently obtained if there is growth seen on an ultrasound.
  • Medication: Decrease factors such as hyperlipidemia (elevated levels of fats in the blood) and/or high blood pressure
  • Open Aneurysm Repair: Replacement of the diseased area of the aorta with a fabric graft
  • Endovascular Aneurysm Repair: A minimally invasive alternative to the open repair
  • Hybrid Aneurysm Repair: Combination of open surgery and endovascular to repair the aorta
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