What can be seen on a carotid ultrasound?
A carotid ultrasound can show whether plaque buildup has narrowed one or both of your carotid arteries and reduced blood flow to your brain. If plaque has narrowed your carotid arteries, you may be at risk of having a stroke. That risk depends on how much of your artery is blocked and how much blood flow is restricted.
What is a normal carotid artery ultrasound?
The usual normal velocity of the common carotid artery is 30-40 cm/sec , but the velocity scale setting should be adjusted for each patient. However, to measure the exact flow velocity, we cannot rely on color Doppler imaging; we need pulsed wave Doppler.
How do you ultrasound a carotid artery?
The sonographer will apply a warm gel to your skin above the site of each carotid artery. The gel helps transmit the ultrasound waves back and forth. The sonographer then gently presses the transducer against the side of your neck. You shouldn’t feel any discomfort during the procedure.
How accurate is a carotid ultrasound?
The second study included 132 carotid arteries in 66 patients. Investigators determined the accuracy of ultrasound for classifying stenosis in 3 categories — less than 60 percent, 60 percent to 79 percent, and 80 percent to 99 percent.
How much carotid artery blockage is normal?
Narrowing of the carotid arteries less than 50% is considered part of normal aging. Narrowing of the carotid arteries between 50-70% carries a low risk of stroke and should be monitored. Narrowing of the carotid arteries more than 70% carries a 2-4% risk of stroke per year (10-20% over five years).
Is 50 blockage in Carotid Artery bad?
In persons with narrowing of the carotid artery greater than 50 percent to 69 percent who do not have symptoms, a more aggressive treatment may be recommended (and if the narrowing increases, then surgery may be an option).
How accurate is carotid artery ultrasound?
Why would you need a carotid ultrasound?
Carotid ultrasound uses high-frequency sound waves to view the carotid arteries. It looks for plaques and blood clots and determines whether the arteries are narrowed or blocked. A Doppler ultrasound shows the movement of blood through the blood vessels. Ultrasound imaging doesn’t use X-rays.
What to expect during a carotid ultrasound?
A standard carotid ultrasound shows the structure of a carotid artery. It may include a Doppler ultrasound – a special ultrasound that shows the movement of blood through the blood vessels. A doctor often will need results from both types of ultrasound to fully assess if there is a problem with blood flow through the carotid arteries.
How accurate is carotid ultrasound?
As reported in medical literature, sensitivity of carotid duplex ultrasound for detecting a stenosis (narrowing) in the internal carotid artery is over 90% and so is the specificity. However, this imaging modality has several limitations which inludes, it is user dependent.
Who should have carotid ultrasound?
High blood pressure