alleryStart learning →The T wave of an electrocardiogram is generated by which event?
ADepolarization of the atria
BRepolarization of the ventricles
CDepolarization of the ventricles
DRepolarization of the atria
Answer & Solution
Correct answer: B. Repolarization of the ventricles
1. Heart muscle contracts when it depolarizes and must repolarize before it can beat again.
2. The ventricles depolarize during the QRS complex, so their recovery has to come afterwards.
3. The T wave is that recovery, the repolarization of the ventricles.
4. It is followed by the P wave that opens the next heartbeat.
5. Atrial repolarization does not get a wave of its own, because the QRS complex hides it.
_Source: OpenStax College Physics (CC BY 4.0), Ch 20 "Electric Current, Resistance, and Ohm's Law", section Electrocardiograms_
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