question_answer 20)

  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

Answer:

                  (b) 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).