…showed first 75 words of 520 total…

…showed last 75 words of 520 total…entricular muscle is much more massive than that of the atria. It is also a complex signal, in part because it incorporates atrial repolarization as well as ventricular depolarization. The ventricles begin contracting shortly after the peak of the R wave. T wave - The smaller wave indicates ventricular repolarization. You do not see a deflection corresponding to atrial repolarization, because it occurs while the ventricles are depolarizing and the electrical events are masked.