(2 )Period of ejection Events: ventricular contraction continuously >the ventricular pressure rise above the arterial/pressure → semilunar valves open >blood pours out of the ventricles Semilunar Semilunar valves closed valves opened AV valves closed AV valves closed Systole: Period of Systole: Period isovolumic contraction. of ejection
(2) Period of ejection Events: ventricular contraction continuously → the ventricular pressure rise above the arterial pressure → semilumar valves open → blood pours out of the ventricles
Rapid ejection period(0.10s, 60% ofthe stroke volume) >Reduced ejection period(0. 15s, 40% of the stroke volume)
➢ Rapid ejection period (0.10s, 60% of the stroke volume) ➢ Reduced ejection period (0.15s, 40% of the stroke volume)
(3)Period of isometric(isovolumic) relaxation Events Semilunar ventricular muscle relax valves opened AV valves - the ventricular pressure closed Semilunar fall valves closed > lower than the aortic Systole: Period of ejection AV pressure valves closed →) aortic valve close >the ventricular pressure Diastole: Period of isovolumic relaxation fall sharply
(3) Period of isometric (isovolumic) relaxation Events: ventricular muscle relax → the ventricular pressure fall → lower than the aortic pressure → aortic valve close → the ventricular pressure fall sharply
Period: 0.06-008S Importance Enable the ventricular pressure fall to the level near the atrial pressure
Period: 0.06-0.08 s Importance: Enable the ventricular pressure fall to the level near the atrial pressure