What aspect of heart health does the Ankle-Brachial Index (ABI) assess?

• A. Cardiac output
• B. Cholesterol levels
• C. Peripheral artery disease and vascular health
• D. Heart chamber dimensions

Answer: (C)

The Ankle-Brachial Index (ABI) is a valuable non-invasive test used specifically to evaluate peripheral artery disease (PAD) and assess vascular health. The test compares blood pressure readings in the patient's ankle with those in the arm (brachial artery). A significant discrepancy between these pressures indicates reduced blood flow to the limbs, which is a hallmark of PAD.

By calculating the ABI, healthcare providers can determine the degree of arterial blockage or narrowing, which is crucial for diagnosing and managing cardiovascular conditions associated with diminished blood circulation. This assessment of vascular health is particularly important because PAD can lead to more severe cardiovascular issues, including heart attacks and strokes.

While other aspects of heart health such as cardiac output, cholesterol levels, and heart chamber dimensions are critical in assessing overall cardiovascular health, they are not relevant to what the ABI specifically measures. The ABI focuses solely on the peripheral circulation and the potential for vascular disease.