What is an ankle-brachial index?
An ankle-brachial index (ABI) is a noninvasive screening test designed to detect arterial insufficiency, which is reduced blood flow through the arteries in your arms and legs. An ABI test helps your doctor determine whether narrowing (or another restriction) in an artery or blood vessel is reducing blood flow to your extremities and helps identify the location and how serious it is.
Why it’s done
The ABI test helps detect cardiovascular conditions, primarily peripheral artery disease (PAD). Your doctor may recommend an ABI test if you have risk factors for PAD. Risk factors may include:
- Age 65 or older
- Type 2 diabetes
- A family history of PAD, heart disease or stroke
- High blood pressure or high cholesterol
- A history of smoking, or using other tobacco products
Your doctor may also recommend an ABI test if you have claudication, which is pain in your calf, hips or thighs that occurs when you walk or move but goes away after you rest. Claudication is often related to PAD.
How to prepare for an ankle-brachial index test
Wear loose, comfortable clothing to your test. Shorts can make it easier for your healthcare provider to put on and remove the blood pressure cuff from your lower calf. Continue to take any medication as prescribed unless your doctor says otherwise. You won’t be able to have an ABI test if you have a fracture or wound on your arms or legs, so talk to your doctor if you’ve experienced a recent injury.
What to expect during an ankle-brachial index
Before the test
On the day of the test, the healthcare provider performing the test will review your medical history. You will lie on your back 10 to 30 minutes before the test.During the test
An ABI test measures your systolic blood pressure, a measurement of how much pressure blood places on your artery walls as your heart contracts.
During the test, your systolic blood pressure will be measured in both of your arms and your ankles.
Each time your blood pressure is taken, your provider will place a cuff around your arm or ankle. After inflating the cuff, they will place a small ultrasound device against your skin to measure your pulse and blood pressure.
This progression enables your doctor to compare the blood pressure readings from each area.
After the test
The ankle-brachial index test is quick and usually takes just a few minutes. It’s a simple, non-invasive procedure that doesn’t require any drugs or sedatives. You will be able to drive yourself after the procedure and continue with your normal daily plans and routine.Ankle-brachial index results
To determine your ABI value, your provider divides the pressure measurements in your ankles by the pressure measurements in your arms. The values will be sent to your referring provider, who will review the test results and recommend the appropriate next steps.
Based on the number from your ankle-brachial index (ABI) test, your results may show:
- No artery blockage (1.0 to 1.4): If your ABI is in this range, you probably don’t have peripheral artery disease (PAD). But if you still have symptoms, you might need another ABI test after exercising.
- Borderline blockage (0.90 to 1.0): You may have early signs of PAD. Your arteries might be starting to narrow, but blood flow isn’t blocked yet. Although the ABI is very accurate, you may get a normal reading even if you have symptoms of PAD. If that’s the case, your doctor may recommend other tests to confirm or rule out a diagnosis.
- PAD (less than 0.90): Results lower than 0.9 suggest PAD. The lower the number, the more severe the PAD. You might need more tests, like an ultrasound or angiography, to check the arteries in your legs.
- Calcification/vessel hardening (higher than 1.4): ABI values above 1.4 indicate a calcified vessel. This means you have plaque buildup in your arteries, causing them to harden.
What does a high ankle-brachial index mean?
An ankle-brachial index greater than 1.4 may suggest the presence of arterial calcification. Calcification in your arteries can occur as you age, but it’s also a sign of heart disease and can increase your risk of heart attacks. Working with a vascular specialist can help you find medications, lifestyle changes or other treatments to address plaque buildup and other conditions, such as diabetes, that can contribute to its formation.
Find a location near you
You can receive an ABI test at Baylor Scott & White locations throughout Central and North Texas. Your results will be shared with your provider, and we can help you arrange for additional care at one of our many heart and vascular locations.
Baylor Scott & White Advanced Heart Failure Clinic - Abilene
1219 E South 11th St Ste B2, Abilene, TX, 79602Baylor Scott & White Advanced Heart Failure Clinic - Amarillo
1901 Medi Park Dr Ste 2051, Amarillo, TX, 79106Baylor Scott & White Advanced Heart Failure Clinic - Dallas
3410 Worth St Ste 250, Dallas, TX, 75246- Monday: 8:00 am - 4:30 pm
- Tuesday: 8:00 am - 4:30 pm
- Wednesday: 8:00 am - 4:30 pm
- Thursday: 8:00 am - 4:30 pm
- Friday: 8:00 am - 4:30 pm
Baylor Scott & White Advanced Heart Failure Clinic - Fort Worth
1400 8th Ave Ste 105, Fort Worth, TX, 76104- Monday: 8:00 am - 4:30 pm
- Tuesday: 8:00 am - 4:30 pm
- Wednesday: 8:00 am - 4:30 pm
- Thursday: 8:00 am - 4:30 pm
- Friday: 8:00 am - 4:30 pm
Baylor Scott & White Advanced Heart Failure Clinic - Longview
906 Judson Rd , Longview, TX, 75601Baylor Scott & White Advanced Heart Failure Clinic - Lubbock
3711 22nd St Ste B, Lubbock, TX, 79410Baylor Scott & White Advanced Heart Failure Clinic - Midland/Odessa
420 E 6th Street Ste 102, Odessa, TX, 79761Baylor Scott & White Advanced Heart Failure Clinic - Tyler
1321 S Beckham Ave , Tyler, TX, 75701Baylor Scott & White Advanced Heart Failure Specialists - Fort Worth
1250 8th Ave Ste 200, Fort Worth, TX, 76104- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Advanced Vein Clinic of North Texas - Grapevine
1600 W College St Ste LL10, Grapevine, TX, 76051- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Advanced Vein Clinic of North Texas - Irving
1110 Cottonwood Ln Ste 210, Irving, TX, 75038- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White All Saints Medical Center - Fort Worth
1400 8th Ave , Fort Worth, TX, 76104Baylor Scott & White Arrhythmia Management - Denton
3333 Colorado Blvd , Denton, TX, 76210- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Arrhythmia Management - Garland
7217 Telecom Pkwy Ste 205, Garland, TX, 75044- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Arrhythmia Management - Grapevine
2020 W State Highway 114 Ste 320, Grapevine, TX, 76051Baylor Scott & White Arrhythmia Management - McKinney
5236 W University Dr POB I, Ste 4900, McKinney, TX, 75071- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Arrhythmia Management - Plano
1820 Preston Park Blvd Ste 1450, Plano, TX, 75093- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Arrhythmia Management - Prosper
111 S Preston Rd Ste 10, Prosper, TX, 75078- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Arrhythmia Management - Rockwall
1005 W Ralph Hall Pkwy Ste 225, Rockwall, TX, 75032Baylor Scott & White Cardiac Surgery - Dallas
621 N Hall St Ste 120, Dallas, TX, 75226- Monday: 8:30 am - 4:30 pm
- Tuesday: 8:30 am - 4:30 pm
- Wednesday: 8:30 am - 4:30 pm
- Thursday: 8:30 am - 4:30 pm
- Friday: 8:30 am - 4:30 pm
Baylor Scott & White Cardiology Consultants of Texas - Dallas
621 N Hall St Ste 500, Dallas, TX, 75226- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
- Monday: 8:30 am - 4:30 pm
- Tuesday: 8:30 am - 4:30 pm
- Wednesday: 8:30 am - 4:30 pm
- Thursday: 8:30 am - 4:30 pm
Baylor Scott & White Cardiology Consultants of Texas - Greenville
4400 Interstate 30 W Ste 300, Greenville, TX, 75402- Monday: 8:30 am - 5:00 pm
- Tuesday: 8:30 am - 5:00 pm
- Wednesday: 8:30 am - 5:00 pm
- Thursday: 8:30 am - 5:00 pm
- Friday: 8:30 am - 5:00 pm
Baylor Scott & White Cardiology Consultants of Texas - Mesquite
1575 Interstate 30 , Mesquite, TX, 75150- Monday: 8:30 am - 5:00 pm
- Tuesday: 8:30 am - 5:00 pm
- Wednesday: 8:30 am - 5:00 pm
- Thursday: 8:30 am - 5:00 pm
- Friday: 8:30 am - 5:00 pm
Baylor Scott & White Cardiology Consultants of Texas - Midway
4431 E US Highway 287 , Midlothian, TX, 76065- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Cardiology Consultants of Texas - Park Cities
9101 N Central Expy Ste 300C, Dallas, TX, 75231- Monday: 8:30 am - 5:00 pm
- Tuesday: 8:30 am - 5:00 pm
- Wednesday: 8:30 am - 5:00 pm
- Thursday: 8:30 am - 5:00 pm
- Friday: 8:30 am - 5:00 pm
Baylor Scott & White Cardiology Consultants of Texas - Red Oak
301 E Ovilla Rd Ste 100, Red Oak, TX, 75154- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Cardiology Consultants of Texas - Waxahachie
2360 N Interstate 35E Ste 110, Waxahachie, TX, 75165- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Cardiothoracic Surgery - Irving
1110 Cottonwood Ln Ste 215, Irving, TX, 75038- Monday: 8:30 am - 4:30 pm
- Tuesday: 8:30 am - 4:30 pm
- Wednesday: 8:30 am - 4:30 pm
- Thursday: 8:30 am - 4:30 pm
- Friday: 8:30 am - 4:30 pm
Baylor Scott & White Cardiovascular Associates - Fort Worth
1307 8th Ave Ste 406, Fort Worth, TX, 76104- Monday: 8:00 am - 4:30 pm
- Tuesday: 8:00 am - 4:30 pm
- Wednesday: 8:00 am - 4:30 pm
- Thursday: 8:00 am - 4:30 pm
- Friday: 8:00 am - 4:30 pm
Baylor Scott & White Cardiovascular Consultants - Denton
3333 Colorado Blvd , Denton, TX, 76210- Monday: 8:30 am - 5:00 pm
- Tuesday: 8:30 am - 5:00 pm
- Wednesday: 8:30 am - 5:00 pm
- Thursday: 8:30 am - 5:00 pm
- Friday: 8:30 am - 5:00 pm
Baylor Scott & White Cardiovascular Consultants - Flower Mound
4421 Long Prairie Rd Ste 200, Flower Mound, TX, 75028- Monday: 8:30 am - 5:00 pm
- Tuesday: 8:30 am - 5:00 pm
- Wednesday: 8:30 am - 5:00 pm
- Thursday: 8:30 am - 5:00 pm
- Friday: 8:30 am - 5:00 pm
Baylor Scott & White Cardiovascular Consultants - Grapevine
2020 W State Highway 114 Ste 200, Grapevine, TX, 76051- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 4:00 pm
Baylor Scott & White Cardiovascular Consultants - Keller
620 S Main St Ste 240, Keller, TX, 76248- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 4:00 pm
Baylor Scott & White Cardiovascular Consultants - Plano
6000 W Spring Creek Pkwy Ste 220, Plano, TX, 75024- Monday: 8:30 am - 5:00 pm
- Tuesday: 8:30 am - 5:00 pm
- Wednesday: 8:30 am - 5:00 pm
- Thursday: 8:30 am - 5:00 pm
- Friday: 8:30 am - 5:00 pm
Baylor Scott & White Cardiovascular Consultants - Plano II
4716 Alliance Blvd Ste 340, Plano, TX, 75093- Monday: 8:30 am - 4:45 pm
- Tuesday: 8:30 am - 4:45 pm
- Wednesday: 8:30 am - 4:45 pm
- Thursday: 8:30 am - 4:45 pm
- Friday: 8:30 am - 4:45 pm
Baylor Scott & White Cardiovascular Consultants at The Star
3800 Gaylord Pkwy Ste 910, Frisco, TX, 75034- Monday: 8:30 am - 5:00 pm
- Tuesday: 8:30 am - 5:00 pm
- Wednesday: 8:30 am - 5:00 pm
- Thursday: 8:30 am - 5:00 pm
- Friday: 8:30 am - 5:00 pm
Baylor Scott & White Cardiovascular Specialists - Mesquite
5308 N Galloway Ave Ste 201, Mesquite, TX, 75150- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Cardiovascular Specialists - Rockwall
6705 Heritage Pkwy Ste 202, Rockwall, TX, 75087- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Clinic - Austin Downtown
200 E Cesar Chavez St Ste G140, Austin, TX, 78701- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Clinic - Austin North Burnet
2608 Brockton Dr , Austin, TX, 78758- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Clinic - Austin Oak Hill
5251 West US Highway 290 , Austin, TX, 78735- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Clinic - Austin River Place
10815 Ranch Road 2222 , Austin, TX, 78730- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Clinic - Brenham Hwy 290
604 Highway 290 W , Brenham, TX, 77833- Monday: 7:00 am - 7:00 pm
- Tuesday: 7:00 am - 5:00 pm
- Wednesday: 7:00 am - 5:00 pm
- Thursday: 7:00 am - 7:00 pm
- Friday: 7:00 am - 5:00 pm
- Saturday: 8:00 am - 12:30 pm
Baylor Scott & White Clinic - Buda Medical Center
5330 Overpass Rd Ste 100, Buda, TX, 78610- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Clinic - Cedar Park
910 E Whitestone Blvd , Cedar Park, TX, 78613- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
- Monday: 7:00 am - 4:30 pm
- Tuesday: 7:00 am - 4:30 pm
- Wednesday: 7:00 am - 4:30 pm
- Thursday: 7:00 am - 4:30 pm
- Friday: 7:00 am - 4:30 pm
- Saturday: 9:00 am - 4:30 pm
- Sunday: 9:00 am - 4:30 pm
Baylor Scott & White Clinic - College Station Rock Prairie
800 Scott and White Dr , College Station, TX, 77845- Monday: 7:30 am - 5:00 pm
- Tuesday: 7:30 am - 5:00 pm
- Wednesday: 7:30 am - 5:00 pm
- Thursday: 7:30 am - 5:00 pm
- Friday: 7:30 am - 5:00 pm
Baylor Scott & White Clinic - Copperas Cove
239 W US Highway 190 , Copperas Cove, TX, 76522- Monday: 7:45 am - 5:00 pm
- Tuesday: 7:45 am - 5:00 pm
- Wednesday: 7:45 am - 5:00 pm
- Thursday: 7:45 am - 5:00 pm
- Friday: 7:45 am - 5:00 pm
Baylor Scott & White Clinic - Georgetown
4945 Williams Dr , Georgetown, TX, 78633- Monday: 7:30 am - 5:00 pm
- Tuesday: 7:30 am - 5:00 pm
- Wednesday: 7:30 am - 5:00 pm
- Thursday: 7:30 am - 5:00 pm
- Friday: 7:30 am - 5:00 pm
Baylor Scott & White Clinic - Round Rock 302 University
302 University Blvd , Round Rock, TX, 78665- Monday: 8:00 am - 5:00 pm
- Tuesday: 8:00 am - 5:00 pm
- Wednesday: 8:00 am - 5:00 pm
- Thursday: 8:00 am - 5:00 pm
- Friday: 8:00 am - 5:00 pm
Baylor Scott & White Clinic - Taylor
403 Mallard Ln , Taylor, TX, 76574- Monday: 7:30 am - 5:00 pm
- Tuesday: 7:30 am - 5:00 pm
- Wednesday: 7:30 am - 5:00 pm
- Thursday: 7:30 am - 5:00 pm
- Friday: 7:30 am - 4:00 pm