What does the QRS complex represent?
A) Atrial depolarization
B) Ventricular contraction
C) Ventricular repolarization
D) Ventricular depolarization

Question

Quizplus · Accepted Answer

When the ventricles are stimulated, a QRS complex is recorded on the ECG. Thus, the QRS complex represents ventricular depolarization. Atrial depolarization is initiated by the SA node on the wall of the right atrium, which is symbolized by the P wave that shows on the EKG. Ventricular contraction happens when the cardiac muscles contract within the ventricles, although this contraction is represented by the QRS on the EKG, the most specific answer related to electricity in the heart (and not heart muscle) is ventricular depolarization. Ventricle repolarization represents the relaxation and journey back to isoelectric baseline, which can include ST segment and T wave.

What Does the QRS Complex Represent