PSV Vr
Normal >45 cm/s <2.0
Moderate stenosis 250-300 cm/s >3.0
High grade stenosis* >350 cm/s >3.5
Occlusion No flow signal or color saturation identifiable
  • A decrease in ABI >0.15 supports the presence of significant disease progression.

'Size, G (2013). Inside Ultrasound Vascular Reference Guide. Inside Ultrasound, Incorporated' – Purchase Now