Which component of the ECG represents the depolarization of the ventricles?

Which of the following components of an ECG represents atrial depolarization?

Which of the following parts of an ECG represents the depolarization of the atria?

Which wave on the ECG represents the depolarization of the atria?

What leads to the production of the P wave in an electrocardiogram?

Which of the following is the second wave on an electrocardiogram (ECG)?

Which of the following electrocardiogram (ECG) waves represents atrial depolarization?

Ventricular depolarization and repolarization are represented by which measure on an electrocardiogram (ECG)?