Short notes on cardiac cycle

Cardiac cycle: The cardiac events that occur from the beginning of the one heart beat to the beginning of the next one is called cardiac cycle.
Cardiac cycle time: the normal cardiac cycle time is the 60/75 sec.=0.8 sec.
The events of cardiac cycle:
A. Electrical event/changes: Electrocardiogram.
B. Mechanical events/changes.
a. Pressure change: Venticular atrial is aortic and pulmonary arterial.
b. Volume change: Ventricular arterial.
c. Production of heart, sounds and apex beat.
Changes occur during cardiac cycle:
a. Changes in pressure
b. Changes in Volume
c. Production of heart sound.