What does the P wave component of the electrocardiographic waveform represent?
A) Atrial contraction
B) Atrial depolarization
C) Sinus node discharge
D) Ventricular contraction

Question

Quizplus · Accepted Answer

The P wave is an electrical event and represents atrial depolarization.Atrial contraction should accompany the P wave but does not always.The sinus node discharge is too faint to be recorded on the surface electrocardiogram.Ventricular contraction usually accompanies the QRS complex.

What Does the P Wave Component of the Electrocardiographic Waveform