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HVAD waveforms and corresponding arterial pressure tracings in an IABP-supported patient immediately after an HVAD implant during standby (A), 1:3 (B), 1:2 (C), and 1:1 IABP (D) trigger modes, respectively. Red bars reflect flow during “unsupported” IABP beats and green bars reflect flow during “supported” beats. HVAD, Heartware continuous-flow ventricular assist device; IABP, intra-aortic balloon pump.
