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

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beginning of the systole

end of systole

contraction of both the atria

initiation of the ventricular contraction .

answer is C.

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Detailed Solution

P wave in a standard ECG represents the depolarisation of atria which leads to the contraction of atria.

(1) Ventricular systole begins shortly after Q wave.

(2) The end of T wave marks the end of ventricular systole.

(4) Ventricular contraction (systole) begins shortly after Q wave.

Note: The term ‘atrial systole’ refers to the contraction of the atria. The term ‘ventricular systole’ refers to the contraction of the ventricle. The term ‘systole’ conventionally refers to ventricular systole.

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