Ankle Brachial Index


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Expiration Date

31 Dec 2023

Last Reviewed

1 Jan 2021

Estimated Time To Finish

60 Minutes

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Activity Description

The ankle-brachial index (ABI) is a non-invasive tool for the assessment of vascular status. It consists of the ratio between the systolic blood pressure of the lower extremity, specifically the ankle, and the upper extremity. This ratio compares the resistance of the blood vessels, with one of the primary factors being the diameter of the vessels. This diameter is narrowed either from internal factors (plaque, intimal tear) or external factors such as compression by soft tissues. The activity reviews the noninvasive diagnostic procedure: the ankle-brachial index. It reviews the role of health care providers in using the tool for screening, diagnosis, treatment, and guidance for patients with various vascular-related conditions.

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Target Audience

This activity has been designed to meet the educational needs of physicians.

Learning Objectives

At the conclusion of this activity, the learner will be better able to:

  • Explain how ABI is useful in various clinical situations in both the acute trauma setting and the chronic clinical setting.
  • Review the differences between normal and abnormal values for ABI
  • Identify the steps for an appropriate evaluation of the potential complications and clinical significance of arterial insufficiency.
  • Describe interprofessional team strategies for improving care coordination and communication to advance and improve outcomes using ABI as a diagnostic tool.

Author(s) / Contributors Disclosure of Conflicts of Interest

Each author, editor, faculty and planning committee member have completed a disclosure form indicating that neither they nor their spouse/partner has a financial interest/arrangement or affiliation that could be perceived as a real or apparent conflict of interest related to the content of this activity.

COMMERCIAL SUPPORT: This activity has received NO commercial support.

Continuing Education Accreditation Information

This activity has been planned and implemented in accordance with the accreditation requirements and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint providership of the Quillen College of Medicine, East Tennessee State University, and StatPearls, LLC. The Quillen College of Medicine, East Tennessee State University is accredited by the ACCME to provide continuing medical education for physicians.

Quillen College of Medicine, East Tennessee State University designates this activity for a maximum of 1.00 AMA PRA Category 1 CreditsTM. Physicians should only claim credit commensurate with the extent of their participation in the activity.

This activity is reported to the following Maintenance of Certification (MOC) boards:
American Board of Internal Medicine
  • Adolescent Medicine
  • Cardiovascular Disease
  • Internal Medicine
  • Hematology
American Board of Pathology
  • Cardiovascular
  • Clinical Pathology
American Board of Pediatrics
  • Adolescent Medicine
  • General Pediatrics
  • Pediatric Cardiology
  • Pediatric Hematology-Oncology
American Board of Surgery
  • General Surgery

Cancellation Policy: Cancellations must be received in writing and a money-back guarantee is provided if not completely satisfied.

  • StatPearls and ETSU reserve the right to cancel any course due to unforeseen circumstances. StatPearls and ETSU will not be responsible for other expenses incurred by the participant in the unlikely event that the program is canceled.

Equal Opportunity

  • StatPearls and ETSU are Equal Opportunity / Affirmative Action / Equal Access Institutions. 

Medium or Media Used:

  • Computer Requirements:  Internet Access
  • E-mail Address

Instructions for Credit

  1. Register for the activity and create a StatPearls login.     
  2. Review the required accreditation information:  Target audience, learning objectives, and disclosure information.
  3. Complete the entire self-study activity.
  4. Complete the post-test assessments.
  5. Successfully pass the post-test with a minimum score of 100%.
  6. Complete the evaluation survey. 
  7. Obtain a certificate.

StatPearls and ETSU adhere to ACCME Standards regarding commercial support of continuing medical education. It is the policy of StatPearls and ETSU that the faculty and planning committee disclose real or apparent conflicts of interest relating to the topics of this educational activity, that relevant conflict(s) of interest are resolved, and also that authors and editors will disclose any unlabeled/unapproved use of drug(s) or device(s) during their presentation. Detailed disclosure will be made prior to starting the activity.

The information provided at this CME/CE activity is for continuing education purposes only and is not meant to substitute for the independent medical/clinical judgment of a healthcare provider relative to diagnostic and treatment options of a specific patient’s medical condition.

  • If you need help with the system or have a question about content, please contact
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Media Usage Rights

The contributors and editors of StatPearls have attested that all associated media (images and video) have been legally cleared for use with this activity.  All copyrights are reserved.


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