DefinitionBy Mayo Clinic Staff
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 an increased 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, increasing your risk of circulatory problems, and possibly causing 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 diseased arteries.
Aug. 22, 2015
- What is peripheral arterial disease? National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/pad/#. Accessed July 23, 2015.
- Mohler ER, et al. Noninvasive diagnosis of arterial disease. http://www.uptodate.com/home. Accessed July 22, 2015.
- AskMayoExpert. How are the results of ankle-brachial index testing classified at Mayo Clinic? Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2015.
- Conte MS, et al. Society for Vascular Surgery practice guidelines for atherosclerotic occlusive disease of the lower extremities: Management of asymptomatic disease and claudication. Journal of Vascular Surgery. 2015;61:2S.
- Ankle brachial index: Quick reference guide for clinicians. Journal of Wound Ostomy and Continence Nursing. 2012;39:S21.
- Litin SC (expert opinion). Mayo Clinic, Rochester, Minn. July 24, 2015.
- Mankad R (expert opinion). Mayo Clinic, Rochester, Minn. Aug. 7, 2015.