Body Fluids and Circulation Question 66

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

(a) S - start of systole

(b) $T$ - end of diastole

(c) $P$ - depolarisation of the atria

(d) R - repolarisation of ventricles

Show Answer

Answer : c

Hints & Solutions

(c) In a standard ECG, the P-wave is a small upward wave that indicates the depolarisation of the atria. This is caused by the activation of SA node.