If all four heart valves are closed and the ventricular

Last updated: 7/26/2022

If all four heart valves are closed and the ventricular myocardium (heart muscle) is contracting the phase of the cardiac cycle is Diastole: sovolumetric contraction Systole, Isovolumetric contraction Diastole: Isovolumetric relaxation Systole. Isovolumetric relaxation