What is an Ankle-Brachial Index (ABI) Test?
Ankle-Brachial Index (ABI) is a simple, non-invasive vascular test that compares the blood pressure in your ankle with the blood pressure in your arm. This test helps evaluate blood flow in your legs and can detect signs of peripheral artery disease (PAD).
ABI testing allows your doctor to identify circulation problems that may increase the risk of heart and blood vessel complications.
Why do people need an ABI test?
Your doctor may recommend an ABI test to evaluate:
- Reduced blood flow in the legs
- Peripheral artery disease (PAD)
- Narrowing or blockage in leg arteries
- Leg pain or cramping while walking
- Poor circulation symptoms
- Risk of future cardiovascular problems
The test can help determine how well blood is flowing through your arteries and whether further evaluation or treatment is needed.
What happens during an ABI test?
During the test, a blood pressure cuff is placed around your arms and ankles. A Doppler ultrasound device is used to measure blood flow and obtain accurate blood pressure readings.
The procedure is:
- Painless
- Quick
- Non-invasive
- Usually completed within a short office visit
No needles, injections, or special preparation are required.
Your doctor will review your results and discuss what they mean for your heart and vascular health.
Based on your ABI results, your doctor may recommend:
- Lifestyle changes
- Medication adjustments
- Additional vascular testing
- A personalized treatment plan
An ABI test can help identify:
- Peripheral artery disease
- Reduced circulation to the legs
- Increased risk of cardiovascular disease
- Arterial narrowing caused by plaque buildup
Early detection allows your healthcare team to manage risk factors and protect your overall cardiovascular health.
ABI testing is considered very safe.
- It does not use radiation
- It does not involve injections
- It does not damage blood vessels
Some patients may feel temporary pressure from the blood pressure cuff during the test.
Before your test:
- Wear comfortable clothing
- Avoid heavy exercise before the appointment
- Follow any instructions provided by your healthcare provider
Before your test:
- Wear comfortable clothing
- Avoid heavy exercise before the appointment
- Follow any instructions provided by your healthcare provider
You may want to ask:
- What do my ABI results indicate?
- Do I have signs of circulation problems?
- Do I need additional vascular testing?
- How can I improve my cardiovascular health?
