In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart ?

Options

A. a) S - start of systole
B. b) T - end of diastole
C. c) P - depolarisation of the atria
D. d) R - repolarisastion of ventricles

Answer

C

Explanation

In a standard ECG, the P wave is a small upward wave that represents depolarisation of atria which leads to contraction of both atria.