Normal parameters of an LVAD

Pump Speed: (in rpm) – this is programmable

  • 5000-6000 rpm for Heartmate III
  • 8000-10000 rpm for Heartmate II

Pump flow: (L/min) – this is a calculated value

  • Derived from speed and power consumption and not directly measured.
  • Flow calculation is proportional to power consumption – flow may not actually represent output to the patient.

Power consumption in watts

Pulsatility index

  • An indication of background native ventricular function