Table 1. Society of Radiologists in Ultrasound Consensus Criteria for Carotid Stenosis 23
|Primary parameters||Secondary parameters|
|Degree of stenosis, %||ICA PSV, cm/sec||ICA/CCA PSV ratio|
What does a carotid Doppler show?
A Doppler ultrasound study – a technique that evaluates blood flow through a blood vessel – is usually part of this exam. It's most frequently used to screen patients for blockage or narrowing of the carotid arteries, a condition called stenosis which may increase the risk of stroke.
What is a normal internal carotid artery velocity?
[PSV = peak systolic velocity; EDV = end diastolic velocity; ICA = internal carotid artery; CCA = common carotid artery]
ICA PSV is <125 cm/sec and no plaque or intimal thickening is visible sonographically.
additional criteria include ICA/CCA PSV ratio <2.0 and ICA EDV <40 cm/sec.