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
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B
Repolarisation of atria
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C
Depolarisation of ventricles
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D
Repolarisation of ventricles
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Solution
The correct option is B
Repolarisation of atria
Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on the skin. One cannot observe the repolarisation of atria via an ECG.