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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 rep- resents the

A

Beginning of the systole

B

End of systole

C

Contraction of both the atria

D

Initiation of the ventricular contraction

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The correct Answer is:
3
Both the option (1) and (3) , are correct . P wave represent atrial depolarisation, i.e., atrial systole (contraction of atria ). Cardiac cycle consits of first systole of heart followed by desatole . Cardiac systole consists of first atrial systole followed by ventricular systole . Thus beginning of systole of heart is represented by atrial systole which is further respresented by the P wave
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