(A) Mid-esophageal 4-chamber view showing a left ventricular assist device inflow cannula (dashed arrow) interrogated with color flow Doppler. (B) Pulse-wave Doppler interrogation of an inflow cannula of a HeartMate III device displays velocities within the normal range as well as the characteristic profile generated by sharp deceleration-acceleration of the pump speed, enabling an "artificial pulse" feature.
