The electrocardiogram (ECG) wave that results from the firing of the sinoatrial (SA) node is the ________ wave.
A) QRS
B) T
C) P
D) S-T

Question

Quizplus · Accepted Answer

The P wave represents depolarization of the atria as a result of the SA node firing. The QRS complex represents depolarization of the ventricles, and the T wave represents repolarization of the ventricles. The S-T segment is the period between ventricular depolarization and repolarization.

The Electrocardiogram (ECG) Wave That Results from the Firing of the Sinoatrial