On a normal ECG, a wave for repolarization of the atria is not recorded.Why
A)The leads are not placed in a position to pick it up.
B)No repolarization of the atria occurs normally.
C)It occurs simultaneously with ventricular depolarization and is masked by the QRS complex.
D)It does not travel through body fluids.

Question

Quizplus · Accepted Answer

The repolarization of the atria occurs simultaneously with the depolarization of the ventricles and is therefore masked by the QRS complex, which represents the depolarization of the ventricles. Therefore, a wave for repolarization of the atria is not recorded on a normal ECG.

On a Normal ECG, a Wave for Repolarization of the Atria