Question

The depolarisation of the atria is represented by

• A. P-wave
• B. Q-wave
• C. T-wave
• D. ORS complex

Answer 1

Answer: (A)

P-wave

Answer 2

A normal electrocardiogram or ECG comprises of a $P$ wave, a $QRS$ wave complex and a $T$ wave in which $P$ wave represents depolarisation of the atria, $QRS$ wave complex represents depolarisation of the ventricles and $T$ wave represents ventricular repolarisation.