A change in the color of the skin on the legs.Sores on the legs, feet or toes that do not heal. Muscle cramping in the hips, thighs or calves after walking or climbing stairs.Leg pain that worsens with activity and improves with rest.An ABI of less than 0.9 may be a sign of peripheral artery disease, which occurs when the arteries that supply blood to the legs become narrowed by cholesterol plaque.Ī physician may order an ankle-brachial index test for a patient who is experiencing symptoms of peripheral artery disease, which include: The ABI is calculated by dividing the blood pressure measured in an artery in an ankle by the blood pressure measured in an artery in an arm. An ankle-brachial index test can help a physician diagnose peripheral artery disease. The ankle-brachial index (ABI) test is a relatively simple diagnostic procedure that compares the blood pressure in the arms with the blood pressure in the legs.
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