Depolarization of the ventricles is represented on an electrocardiogram by the
A) P wave.
B) T wave.
C) S wave.
D) QRS complex.
E) PR complex.

Question

Quizplus · Accepted Answer

The QRS complex represents depolarization of the ventricles, which is the phase where the ventricles contract and pump blood out of the heart. The P wave represents atrial depolarization and the T wave represents ventricular repolarization. The S wave and PR complex are not specific waves observed on an electrocardiogram.

Depolarization of the Ventricles Is Represented on an Electrocardiogram by the