The diagram given here is the standard $E C G$ of a normal person. The P-wave represents the :

Contraction of both the atria

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Initiation of the ventricular contraction

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Beginning of the systole

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End of systole

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Solution

The correct option is A Contraction of both the atria
P wave in an ECG shows contraction of both the atria.

ECG is a graphical representation of the electrical activity of the heart during a cardiac cycle. Each peak in the ECG is identified with a letter from P to T that corresponds to a specific electrical activity of the heart.

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Match column I with column II regarding the standard ECG of a normal person.
$\begin{matrix} C o l u m n - I & C o l u m n - I I (a) & P - w a v e & (i) & A t r i a l d e p o l a r i z a t i o n (b) & Q R S w a v e & (i i) & V e n t r i c u l a r d e p o l a r i z a t i o n (c) & T w a v e & (i i i) & V e n t r i c u l a r r e p o l a r i s a t i o n \end{matrix}$

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

The diagram given here is the standard $E C G$ of a normal person. The P-wave represents the :