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The diagram given here is the standard E...

The diagram given here is the standard ECG of a normal person.The P-wave represents the

A

contraction of both the atria

B

initiation of the ventricular contraction

C

beginning of the systole

D

end of systole

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The correct Answer is:
A
(a) In ECG, P-wave represents the depolarisation of atria which leads to the concentration of both atria. T-wave represents the return of ventricles from excited to normal state. The QRS complex represents the depolarisation of the ventricles which initiates ventricular contraction. The contraction starts shortly after Q and marks the beginning of systole.
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