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(C) The correct answer is $(C)$.In the given diagram,the $P$-wave represents the electrical excitation (or depolarisation) of the atria,which leads to

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contraction of both the atria

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(C) The correct answer is $(C)$.In the given diagram,the $P$-wave represents the electrical excitation (or depolarisation) of the atria,which leads to the contraction of both the atria.The $QRS$ complex represents the depolarisation of the ventricles,which initiates the ventricular contraction.The contraction starts shortly after $Q$ and marks the beginning of the systole.The $T$-wave represents the return of the ventricles from an excited to a normal state (repolarisation).The end of the $T$-wave marks the end of systole.

Column $-I$	Column $-II$
$(a) \; P-$wave	$(i) \; \text{Depolarisation of ventricles}$
$(b) \; QRS$ complex	$(ii) \; \text{Repolarisation of ventricles}$
$(c) \; T-$wave	$(iii) \; \text{Coronary ischemia}$
$(d) \; \text{Reduction in the size of } T-$wave	$(iv) \; \text{Depolarisation of atria}$
	$(v) \; \text{Repolarisation of atria}$

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

Similar Questions

The following is a diagrammatic representation of a standard $ECG$. Which wave represents the contraction of both atria?

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Given below is the $ECG$ of a normal human. Which one of its components is correctly interpreted below?

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