DefinitionBy Mayo Clinic staff
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The ankle-brachial index test is a quick, noninvasive way to check your risk of peripheral artery disease (PAD). Peripheral artery disease is a condition in which the arteries in your legs or arms are narrowed or blocked. People with peripheral artery disease are at a high risk of heart attack, stroke, poor circulation and leg pain.
The ankle-brachial index test compares your blood pressure measured at your ankle with your blood pressure measured at your arm. A low ankle-brachial index number can indicate narrowing or blockage of the arteries in your legs, leading to circulatory problems, heart disease or stroke. The ankle-brachial index test is sometimes recommended as part of a series of three tests, including the carotid ultrasound and abdominal ultrasound, to check for blocked or narrowed arteries.
- Grenon SM, et al. Ankle-brachial index for assessment of peripheral artery disease. New England Journal of Medicine. 2009;361:e40.
- Ankle-brachial index. Vascular Disease Foundation. http://vasculardisease.org/peripheral-artery-disease/pad-diagnosis/ankle-brachial-index/. Accessed Sept. 18, 2012.
- AskMayoExpert. How are the results of ankle-brachial index testing classified at Mayo Clinic? Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2012.
- Rooke TW, et al. 2011 ACCF/AHA focused update of the guideline for the management of patients with peripheral artery disease (updating the 2005 guideline): A report of the American College of Cardiology Foundation/American Heart Association Task Force on practice guidelines. Circulation. 2011;124:2020.
- Ankle Brachial Index Collaboration. Ankle brachial index combined with Framingham Risk Score to predict cardiovascular events and mortality: A meta-analysis. Journal of the American Medical Association. 2008;300:197.
- Grogan M (expert opinion). Mayo Clinic. Rochester, Minn. Aug. 24, 2012.