<prompt> Isometric relaxation is defined asRelaxation of both atriaRelaxation of both atria with all valves openRelaxation of LV with mital and aortic valve closedRelaxation of LV with mital and aortic valve open  <response>: Ans. c Relaxation of LV with mital and aortic valve closedRef: Ganong, 25th edp.541Isovolumetric relaxationAt the end of systole both the AV valves and semilunar valves are closed, pressure inside the ventricles falls even more without any change in volumeisovolumetric 