Which cardiac event occurs during the qrs wave in the ecg?

Ventricular depolarization occurs in the QRS complex in an ECG.

Explanation:

The electrocardiogram represents a record of the electrical activity of the heart. In the case of the QRS complex, ventricular depolarization occurs. Its analysis is very useful for the diagnosis of cardiac arrhythmias, ventricular hypertrophy, acute myocardial infarction, among other disorders.

answer; (c); /out to the side and directly under the dogs neck.