Ankle Brachial Index (ABI)

Also known as: ABI or exercise ABI

Duration: About 30 minutes

The ABI is a noninvasive, rapid test that can check for peripheral arterial disease (PAD) by measuring the blood pressures of your ankles and arms. The ABI can be compared before and after walking on a treadmill or riding on a stationary bicycle (known as exercise ABI) to evaluate the degree of stenosis/narrowings. If the ABI is low, it could be indicative of blocked or stenosed peripheral arteries.

Uses: 

• To check for peripheral artery disease with symptoms (ex: leg pain while walking) or without symptoms
• If you have a history of diabetes, smoking (or tobacco use), high blood pressure, high cholesterol, and atherosclerosis 
• To follow up after surgery in the blood vessels of you your leg
• To evaluate the risk of future heart attack or stroke

Preparing for the test: 

Download Pre Test Instructions

How it is performed: 

• Firstly, you are asked to lie down to relax for a few minutes.
• The resting blood pressures of both of your ankles and arms will be taken using an inflatable cuff; the readings will be compared in both sides of the body.
• An ultrasound probe will also be placed against your ankles and arms.
• Once the cuff is deflated, the ultrasound shows pictures of how well the blood flows in the arteries and the pulse can also be heard.

After the test:

• Your cardiologist will discuss the results with you.
• You can continue with your daily routine.
• Ask your cardiologist if you have any questions or concerns.