Question

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 - depolarization of the atria
• D. R- repolarization of ventricles

Answer 1

The correct option is C P - depolarization of the atria

A normal electrocardiogram (ECG) is composed of a P wave, a QRS wave and a T wave. The P wave is a small upward wave that indicates the depolarization of the atria. This is caused by the excitation of SA node.