A Carotid Doppler (ultrasound) involves exposing part of the body to high-frequency sound waves to produce pictures of the inside of the body. Images are captured in real-time, which means they can show the structure and movement of the body's internal organs, along with the blood flowing through blood vessels. Doppler ultrasound is a special ultrasound technique that evaluates blood as it flows through a blood vessel, including the body's major arteries and veins in the abdomen, arms, legs and neck.
This type of diagnostic testing is performed to detect narrowing, or stenosis, or a carotid artery, which a condition that increases the risk of stroke. It may also be performed if an abnormal sound is heard in the neck (carotid bruit) with a stethoscope, or if a patient has high blood pressure. Doppler images can help the physician to see and evaluate blockages to blood flow, narrowing of vessels, and tumors and congenital malformation.