ECG depicts the depolarisation and repolarisation process during the cardiac cycle. In the ECG of a normal healthy individual one of the following waves is not represented.
(a) Depolarisation of atria
(b) Repolarisation of atria
(c) Depolarisation of ventricles
(d) Repolarisation of ventricles

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Solution

Option (b) Repolarisation of atria

A normal ECG represents P-wave atrial depolarisation QRS complex - ventricular depolarisation T-wave ventricular repolarisation. Therefore, atrial repolarisation is not represented is not represented in an electrocardiogram (ECG).

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Similar questions

	Column I		Column II
A	P-wave	1	Depolarisation of ventricles
B	QRS complex	2	Repolarisation of ventricles
C	T-wave	3	Coronary ischemia
D	Inversion of T-wave	4	Depolarisation of atria
		5	Repolarisation of atria

\begin{matrix} A. P wave & i) depolarisation of atria B. T wave & ii) repolarisation of ventricles C. QRS wave & iii) depolarisation of ventricles \end{matrix}