Essentials For Oral Sedation Monitoring Practice Test

Which ECG waveform represents ventricular repolarization?

P Wave QRS Complex T Wave U Wave

Correct Answer:

T Wave

Explanation:

The main idea is understanding what each waveform represents in the heart’s electrical cycle. Ventricular repolarization is the ventricles returning to their resting electrical state after contraction. This recovery shows up on the ECG as the T wave, which follows the QRS complex that marks ventricular depolarization. The P wave corresponds to atrial depolarization, not ventricular recovery, and the QRS complex reflects the rapid depolarization of the ventricles. A U wave can occur in some individuals and may represent late or Purkinje fiber-related repolarization, but the standard indicator of ventricular repolarization is the T wave.

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