Ankle-Brachial Index (ABI)

If your doctor has concerns about the circulation in your legs or is monitoring treatment, he or she may perform an Ankle-Brachial Index or ABI. An ABI is essentially a comparison of the blood pressure in your arm and the blood pressure in your ankle. A ratio of these two measurements can evaluate how well blood is circulating within your legs.

An ABI is a non-invasive procedure that will typically be performed on the arm and ankle using a regular blood pressure cuff and ultrasound equipment. In patients with normal circulation, the blood pressure measurement taken on the arm is equal to the blood pressure measurement taken on the ankle. If an ABI shows that the blood pressure in a patient’s ankle is lower than the blood pressure in their arm, it is possible that the arteries in the legs have narrowed. It is important to note that an ABI may determine if arterial disease is present, but it does not detect which arteries are affected or the extent of the disease.

If an ABI indicates that your leg arteries have narrowed, further tests may be required to determine the extent of arterial damage.

Patient Locations

To Make an Appointment Please Call: 203.785.2561

Yale-New Haven Hospital 
20 York Street
New Haven, CT 06510

Yale Physicians Building
800 Howard Avenue, 2nd Floor
New Haven, CT 06519

Yale-New Haven Shoreline Medical Center
111 Goose Lane
Guilford, CT 06437

Yale-New Haven Heart & Vascular Center
2 Devine Street
North Haven, CT 06473

Lawrence & Memorial Hospital
365 Montauk Avenue
New London, CT 06320

Milford Physician Services
234 Broad Street
Milford, CT 06460

Veterans Affairs Medical Center, West Haven
950 Campbell Avenue
West Haven, CT 06516

Shoreline Foot and Ankle Center
85 Poheganut Drive
Groton, CT 06340