If an impulse generated by the AV node begins moving upward through the atria before the other part of it enters the ventricles:
A) the PR intervals will be greater than 0.20 seconds.
B) an upright P wave will appear after the QRS complex.
C) an inverted P wave will appear before the QRS complex.
D) a small inverted P wave will be buried in the QRS complex.
Answer: C) an inverted P wave will appear before the QRS complex.
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