Question

in an ecg (electrocardiogram), the p wave represents ____________. a depolarization of the atria b depolarization of the ventricles c repolarization of the atria d repolarization of the ventricles

Explanation:

In an ECG, the P wave is the first wave. Atrial depolarization (contraction preparation) occurs first. Ventricular depolarization is represented by the QRS complex. Atrial repolarization is masked by the QRS complex. Ventricular repolarization is the T wave.

Answer:

A. depolarization of the atria