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Figure 4 Inflow valve regurgitation (IVR) waveforms. Pressure tracing taken from the left ventricle (LV) in the presence of severe IVR during periods of asynchronous and synchronous pumping. Arrows indicate IVR waves associated with regurgitation from the left ventricular assist device (LVAD) into the LV when the LVAD ejects. Other abbreviations same as in Figure 3.
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