2nd October 2019


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.

Herein, what is the normal ICA CCA ratio?

Table 1. Society of Radiologists in Ultrasound Consensus Criteria for Carotid Stenosis 23
Primary parametersSecondary parameters
Degree of stenosis, %ICA PSV, cm/secICA/CCA PSV ratio

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.
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