Which of the following refers to the contraction of the ventricles following depolarization?

A) QRS complex
B) T wave
C) Q-T interval
D) S-T segment
E) P wave

QRS Complex

A portion of an electrocardiogram (EKG) representing the depolarization of the heart's ventricles, preceding the ventricular contraction.

Ventricles

Ventricles are the two lower chambers of the heart that receive blood from the atria and pump it out to the lungs and the rest of the body.

Depolarization

The process by which a cell's resting negative membrane potential becomes less negative or positive, leading to the initiation of an action potential in nerve and muscle cells.