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Carotid Bruit

carotid bruit auscultation

Carotid Bruit Overview

This course extends auscultation skills by a series of case studies related to carotid artery disease.

A bruit is caused by turbulent blood flow in an artery which supplies blood to the brain. Increased stenosis of a carotid artery results in increased duration, intensity, and pitch of the bruit.

Carotid bruit sounds and a basal heart murmur are easily confused. Because the sounds radiate throughout the body, a heart murmur will be heard, with reduced intensity, at the auscultation points above the clavicle and a carotid bruit will be heard (again with reduced intensity) at the auscultation points below the clavicle. If the intensity of sound is greater above the clavicle, it is most likely a carotid bruit. If it is louder below the clavicle, it is most likely a heart murmur.

Use either the bell or the diaphragm when listening for the carotid bruit, at a point just lateral to the Adam's apple. Listen for the murmur of aortic stenosis at the second right intercostal space (2RICS).

An early systolic bruit is associated with a 50% decrease in carotid artery luminal diameter. A pansystolic bruit is associated with a 60% reduction in luminal diameter. A pansystolic bruit that extends into early diastole is associated with a decrease in luminal diameter of 70% to 80%.

The patient cases provide a content for practicing carotid artery exams. Each case consists of multiple pages which summarize patient history, heart and carotid bruit sounds, lab results and diagnosis.

After completing a lesson, use the lesson table of contents to navigate to another lesson.

When all lessons have been completed, we recommend using the auscultation practice exercises or quiz. In order to gain a certificate of achievement, please complete the course lessons and practice drill during one session. Most users complete the course in 30-45 minutes.



Course Contributors

Authored by Dr. Jonathan Keroes, MD, David Lieberman, Developer, Virtual Cardiac Patient. Medically reviewed by Dr. Barbara Erickson, PhD, RN, CCRN.

Course Completion

Registered users can earn a certificate of achievement for this module by reading all content and then earning a passing score on this module's quiz.

Completed modules and related scores can be viewed on the dashboard.

Sources

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