Arterial Doppler assessment in LVAD patients

In patients with a left ventricular assist device (LVAD), spectral Doppler waveforms are altered due to continuous flow provided by the pump in the device:

  • waveforms are monophasic with a constant antegrade flow and no flow below the baseline.
  • the waveform is typically parvus-tardus with a slow systolic upstroke and rounded systolic peak. 
    • less commonly there may be non-pulsatile flow with no systolic peak. 
    • the systolic peak is thought to be due to intrinsic residual myocardial reserve pumping some of the blood, whereas lack of a systolic peak is thought to occur when the left ventricle is simply acting as a passive conduit and all blood is being pumped by the device.
  • peak systolic velocity is reduced.

These findings have been demonstrated diffusely in multiple arterial beds, including the carotid, vertebral, subclavian and common femoral arteries.

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Article information

rID: 18112
Systems: Vascular, Cardiac
Tag: refs
Synonyms or Alternate Spellings:
  • LVAD - arterial Doppler assesssment

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