Explain why the atrial repolarization is not visible on the

Explain why the atrial repolarization is not visible on the ECG. it is superimposed by the QRS complex it is to small to show up on the graph it occurs at the same exact moment as the atrial depolarization it does not occur In which stage are the ventricles entirely closed?

Solution

It is to small to show up on the graph.

There is no distinctly visible wave representing atrial repolarization in the ECG because it occurs during ventricular depolarization. Because the wave of atrial repolarization is relatively too small in amplitude and it is masked by the much larger ventricular-generated QRS complex.