Working of Heart

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 Working of Heart

The cardiac events that occur from the beginning of one heart beat to the begning of the next constitute a cardiac cycle.

it consists 3 phases

1. atrial systole  (0.1)

2. ventricular systole  (0.3)

3. Joint diastole  (0.4)

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Cardiac Output: The volume of blood pumped out by each ventricle, for each heart beat, is known as the stroke volume. the volume of blood pumped out by the heart from each ventricle per minute is termed cardiac output

Stroke volume X No.of beats per minute  = 70 ml/beat X 72 beats/min  = 5040 ml/min (5 liters) 


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