The phase of the cardiac cycle where the ventricles are in systole but there is no change in ventricuar volume is called ____________.

Question

14-08-2019
Medicine

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The phase of the cardiac cycle where the ventricles are in systole but there is no change in ventricuar volume is called ____________.

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Answer:

Isovolumetric contraction.

Explanation:

Isovolumetric contraction -

It is an event which occurs at the early systole during which the ventricles contracts and volume is kept constant .

It is a short portion of the cardiac cycle which takes place when all the valves of the heart are closed .

The phase of isovolumetric contraction last for about 0.03 s , and this time period is sufficient to generate high pressure which can overcomes that of aorta and the pulmonary trunk on the opening the valves .