In a standard ECG,one of the following functi | vedclass

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(A) $P$ is the contraction of only left atria is incorrect because the $P$-wave represents the electrical excitation (depolarisation) of both atria,wh

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$P$ is the contraction of only left atria

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(A) $P$ is the contraction of only left atria is incorrect because the $P$-wave represents the electrical excitation (depolarisation) of both atria,which leads to the contraction of both atria simultaneously.$ECG$ or Electrocardiogram records the electrical activity of the heart to diagnose various cardiac conditions.$1$. The $P$-wave represents atrial depolarisation,which leads to the contraction of both atria.$2$. The $QRS$ complex represents ventricular depolarisation,which initiates ventricular contraction (systole).$3$. The $T$-wave represents ventricular repolarisation,which marks the end of ventricular systole as the ventricles begin to relax.

In a standard $ECG$,one of the following functions of its components is not correctly interpreted.

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The $T$-wave in an $ECG$ represents

Normal diastolic pressure in a young man is about (in $,\text{mm Hg}$)

Consider the following statements with respect to $ECG$ [Electrocardiogram] and choose the correct answer.
Statement $I$ : '$P$' wave represents the depolarisation of ventricles.
Statement $II$ : '$T$' wave represents the repolarisation of ventricles.

In $ECG,$ $T$-wave represents:

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