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

Question 218

Multiple Choice

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.
E) it is too small to be picked up by external recording electrodes.

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