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Peak systolic velocity ratios arterial duplex
Peak systolic velocity ratios arterial duplex
Ratio PSV* at stenotic segment/normal segment
Degree of stenosis
1.5-2.0
30-49 percent
2.0-4.0
50-75 percent
>4.0
>75 percent
Measuring the degree of stenosis using duplex ultrasound.
* PSV: peak systolic velocity.
Courtesy of the Division of Vascular Surgery at OHSU.
Graphic 80574 Version 2.0