Carotid Arterial Duplex

Also known as: Carotid doppler ultrasound

Duration: About 30 to 45 minutes

A duplex is a noninvasive test that combines both the doppler and the ultrasound. It can be performed on either your arteries or veins.

Areas generally tested:
Peripheral Arteries (arms & legs) – Arterial Duplex 
Carotid Arteries (neck) – Carotid Duplex 
Renal Arteries (kidneys) – Renal Duplex

In a carotid duplex, two different probes/ transducers (one for the doppler and one for the ultrasound) are used to measure how well the blood is flowing in the carotid arteries.

Uses: 

• To check for any stenosis/narrowings in the carotid arteries of the neck   
• To check for decreased blood flow – ex: carotid arterial disease
• To check for blood clots
• To check for any bulgings/aneurysms
• In those with a family history of heart disease
• In those with a history of strokes or transient ischemic attacks (TIA)

Preparing for the test: 

Download Pre Test Instructions

How it is performed: 

• A technician applies a gel over the tight and left sides of your neck. 
• The ultrasound probe is held firmly against your skin and glided in multiple directions as it sends out sound waves to the carotid arteries. Images are created when the probe picks up sound waves that bounce back from the carotid arteries. 
• Then the doppler probe is held firmly against your skin and sends out sound waves to the red blood cells in neck arteries. The blood flow is heard and assessed for any stenosis/narrowings or blockages.

After the test:

• Your cardiologist will discuss the result with you.
• You can continue with your daily routine.
• Ask your cardiologist if you have any questions or concerns.