ECG depicts the depolarisation and repolarisation processes 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
In a normal ECG, P-wave depolarization of atria, QRS complex-ventricular depolarization, and T-wave repolarization of ventricles are depicted. Therefore, the repolarization of atria is not shown. The answer is the option (b) Repolarisation of atria