Stenosis

Maximal systolic velocitiy cm/s

End- systolic velocity cm/s

Carotid report

0

<125

<40

<2

0-50 %

<125

<40

<2

50-69%

125-130

40-100

2-3.5

≥ 70%

>230

>100

>3.5

Pre occlusion

High, low unquantifiable

Variable

Variable