Which wave of the human heart ECG (PQRST) is | vedclass

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(B) The $QRS$ complex represents the depolarization of the ventricles,which initiates ventricular contraction. By counting the number of $QRS$ complex

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$QRS$

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(B) The $QRS$ complex represents the depolarization of the ventricles,which initiates ventricular contraction. By counting the number of $QRS$ complexes that occur in a given time period,one can determine the heart rate of an individual. Since $ECGs$ obtained from different individuals have roughly the same shape for a given lead configuration,any deviation from this shape indicates a possible abnormality or disease. Therefore,the $QRS$ complex is of great clinical significance for determining heart rate.

Which wave of the human heart $ECG$ $(PQRST)$ is used for determining the heart rate of an individual?

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