Which of the following stage would appear just after 'dupp'(second heart sound)

Isovolumetric contraction

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Isovolumetric relaxation

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Third heart sound

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Atrial systole

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Solution

The correct option is A Isovolumetric contraction
Third heart sound is sometimes the extra sound heard as lub-dub-ta .
Iso volumetric contraction occurs just after the second sound.
After the first sound isovolumetric contraction occurs.
Atrial systole is the closing of all the valves in the atrium.
So the correct option is ' Isovolumetric relaxation'.

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