Harvard Heart Letter

Ask the doctor: What does a low ankle-brachial index mean?

A score below 1.0 on an ankle-brachial index tests suggest the presence of peripheral artery disease (PAD). This condition, usually caused by a buildup of fatty deposits in the arteries of the legs, can cause pain and cramping during exercise.
To continue reading this article, you must login.
  • Research health conditions
  • Check your symptoms
  • Prepare for a doctor's visit or test
  • Find the best treatments and procedures for you
  • Explore options for better nutrition and exercise
Learn more about the many benefits and features of joining Harvard Health Online »