Mesenteric artery ischemia
Mesenteric artery ischemia occurs when there is a narrowing or blockage of one or more of the three major arteries that supply the small and large intestines. These are called the mesenteric arteries.
Mesenteric vascular disease; Ischemic colitis; Ischemic bowel - mesenteric; Dead bowel - mesenteric; Dead gut - mesenteric; Atherosclerosis - mesenteric artery; Hardening of the arteries - mesenteric artery
The arteries that supply blood to the intestines run directly from the aorta, the main artery from the heart.
Hardening of the arteries occurs when fat, cholesterol, and other substances build up in the walls of arteries. This problem is more common in smokers and in people with high blood pressure or high blood cholesterol.
When this hardening occurs in the mesenteric arteries , the end result is narrowed blood vessels and reduced blood flow to the intestines. Like every other part of the body, blood brings oxygen to the intestines. When the oxygen supply is slowed, symptoms may occur.
The blood supply to the intestines may be suddenly blocked by a blood clot (embolus). The clots most often come from the heart or aorta. These clots are more commonly seen in people with abnormal heart rhythms such as atrial fibrillation.
Symptoms caused by gradual hardening of the mesenteric arteries:
Symptoms of sudden (acute) mesenteric artery ischemia due to a traveling blood clot:
Exams and Tests
When symptoms begin suddenly or become severe, blood tests may show a higher than normal white blood cell count and changes in the blood acid level. There may be bleeding in the GI tract.
A Doppler ultrasound or CT angiogram scan may show problems with the blood vessels and the intestine.
A mesenteric angiogram is a test that involves injecting a special dye into your bloodstream to highlight the arteries of the intestine. Then x-rays are taken of the area. This can show the location of the blockage in the artery.
When blood supply is blocked to a part of the heart muscle, the muscle will die. This is called a heart attack. A similar type of injury can occur to any part of the intestines.
When the blood supply is suddenly cut off by a blood clot, it is an emergency. Treatment can include medicines to dissolve the blood clots and open up the arteries.
If you have symptoms due to hardening of the mesenteric arteries, there are things you can do to control the problem:
The outlook for chronic mesenteric ischemia is good after a successful surgery. However, it is important to make lifestyle changes (such as a healthy diet and exercise) to prevent hardening of the arteries from getting worse.
People with hardening of the arteries that supply the intestines often have the same problems in blood vessels that supply the heart, brain, kidneys, or legs.
People with acute mesenteric ischemia often do poorly because portions of the intestine may die before surgery can be done. However, with prompt diagnosis and treatment, acute mesenteric ischemia can be treated successfully.
Tissue death from lack of blood flow (infarction) in the intestines is the most serious complication of mesenteric artery ischemia. Surgery may be needed to remove the dead portion.
When to Contact a Medical Professional
Call your provider if you have:
The following lifestyle changes can reduce your risk for narrowing of the arteries:
Brandt LJ, Feuerstadt P. Intestinal ischemia. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. 10th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 118.
Hauser SC. Vascular diseases of the gastrointestinal tract. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 143.
Review Date: 1/28/2016
Reviewed By: Subodh K. Lal, MD, gastroenterologist at Gastrointestinal Specialists of Georgia, Austell, GA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.