Isometric relaxation is defined as
Ans. (c) Relaxation of LV with mital and aortic valve closedRef: Ganong, 25th ed/p.541Isovolumetric relaxation#At the end of systole both the AV valves and semilunar valves are closed, pressure inside the ventricles falls even more without any change in volume(isovolumetric)
Relaxation of both atria
Relaxation of both atria with all valves open
Relaxation of LV with mital and aortic valve closed
Relaxation of LV with mital and aortic valve open
Heart, Circulation, and Blood