Carotid Artery Doppler Scan

What is A Carotid Artery Duplex Scan

A carotid artery duplex scan is a type of vascular ultrasound study done to assess the blood flow of the arteries that supply blood from the heart through the neck to the brain. There are four carotid arteries – the right and left internal carotid arteries and the right and left external carotid arteries. One pair (external and internal) is located on each side of the neck.

A carotid artery duplex scan is a noninvasive (the skin is not pierced) procedure. The term “duplex” refers to the fact that two modes of ultrasound are used – Doppler and B-mode. The B-mode transducer (like a microphone) obtains an image of the carotid artery being studied. The Doppler probe within the transducer evaluates the velocity and direction of blood flow in the vessel.

Vivacare public information from The National Institute of Neurological Disorders and Stroke

Last updated January 24, 2008

This information is for general educational uses only. It may not apply to you and your specific medical needs. This information should not be used in place of a visit, call, consultation with or the advice of your physician or health care professional. Communicate promptly with your physician or other health care professional with any health-related questions or concerns.

Be sure to follow specific instructions given to you by your physician or health care professional.

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