In a standard ECG,what does the QRS complex r | vedclass

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(C) In a standard $ECG$ (Electrocardiogram),the $QRS$ complex represents the depolarization of the ventricles.This electrical activity initiates the v

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Depolarization of the ventricles

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(C) In a standard $ECG$ (Electrocardiogram),the $QRS$ complex represents the depolarization of the ventricles.This electrical activity initiates the ventricular contraction (systole).The $P$-wave represents the electrical excitation (or depolarization) of the atria,which leads to the contraction of both the atria.The $T$-wave represents the return of the ventricles from an excited to a normal state (repolarization).

In a standard $ECG$,what does the $QRS$ complex represent?

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