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Recent developments in adjunctive therapy have enabled us to remove once-implanted left ventricular assist devices. For successful device removal, appropriate patient selection and precise evaluation of cardiac function are essential. However, with rotary pumps, pump weaning inevitably creates diastolic retrograde pump flow, and this flow may overload the native heart. We developed a novel "off-test mode" for weaning, which increases revolutions per minute just in diastole. The present study evaluated the effect of this mode on retrograde pump flow and ventricular workload.

journal of thoracic and cardiovascular surgery

Creating an ideal “off-test mode” for rotary left ventricular assist devices: Establishing a safe and appropriate weaning protocol after myocardial recovery