In ECG,the T-wave represents: | vedclass

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(B) In an $ECG$ (Electrocardiogram),the electrical activity of the heart is recorded as a series of waves.$1$. The $P$-wave represents the electrical

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Repolarisation of ventricle

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(B) In an $ECG$ (Electrocardiogram),the electrical activity of the heart is recorded as a series of waves.$1$. The $P$-wave represents the electrical excitation (or depolarisation) of the atria,which leads to the contraction of both the atria.$2$. The $QRS$ complex represents the depolarisation of the ventricles,which initiates the ventricular contraction.$3$. The $T$-wave represents the return of the ventricles from an excited to a normal state (repolarisation).Therefore,the $T$-wave marks the end of the systole.

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

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The figure below shows a typical $ECG$ of a normal human. What does the $P$-wave represent?

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