The carotid and vertebral arteries, which supply blood flow to the brain, are located on either side of the neck. A carotid/vertebral test uses high frequency ultrasound to visualize blood vessel walls and examine blood flow within the carotid, vertebral and subclavian arteries.
The vertebral arteries, which supply blood flow to the brain, are located on either side of the neck. ... A carotid/vertebral duplex test uses high frequency ultrasound to visualize blood vessel walls and examine bloodflow within the carotid, vertebral and subclavian arteries.