Doppler waveforms

Doppler waveforms are often misinterpreted and/or overlooked. They can provide great deal of information if carefully understood.

Radiographic features


When interrogating flow with spectral Doppler, the three basic arterial waveforms are 1,2:

  • triphasic
    • forward flow in systole
    • reverse flow in late systole / early diastole
    • forward flow in late diastole
  • biphasic: having two phases or variations having forward and reverse flow 7
    • reverse flow in diastole
    • steady positive flow in the diastole, or
    • forward flow in systole
  • monophasic: single phase with slow (dampened flow) acceleration/deceleration
    • low velocity
    • high velocity

Triphasic flow is considered normal and monophasic flow is considered abnormal. Most authors consider biphasic flow abnormal, although some authors classify it as a normal waveform 2

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Article information

rID: 42049
System: Vascular
Section: Physics
Tag: refs, cases, stub
Synonyms or Alternate Spellings:
  • Doppler waveform

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Cases and figures

  • Case 1: triphasic Doppler waveform
    Drag here to reorder.
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