In an $ECG$,the depolarization of atria is indicated by

In a normal adult man,the blood pressure is

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

Rise in blood pressure is directly related to the following $EXCEPT$ . . . . . . .

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.

$ECG$ depicts the depolarization and repolarization processes during the cardiac cycle. In the $ECG$ of a normal healthy individual,one of the following waves is not represented?