Ankle–brachial pressure index

Ankle–brachial pressure index
Measuring the ankle-brachial index
SynonymsAnkle-brachial index
PurposeDetection of peripheral artery disease

The ankle-brachial pressure index (ABPI) or ankle-brachial index (ABI) is the ratio of the blood pressure at the ankle to the blood pressure in the upper arm (brachium). Compared to the arm, lower blood pressure in the leg suggests blocked arteries due to peripheral artery disease (PAD). The ABPI is calculated by dividing the systolic blood pressure at the ankle by the systolic blood pressure in the arm.

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