Which waveform represents ventricular repolarization?

Which waveform represents ventricular repolarization?

• A. P-wave
• B. QRS complex
• C. T-wave
• D. NSR

Answer: (C)

Key idea: on an ECG, different waves correspond to different electrical events of the heart. Ventricular repolarization is when the ventricles reset electrically after contracting, and this shows up as the T wave. The P-wave reflects atrial depolarization, the QRS complex reflects ventricular depolarization, and NSR is a rhythm pattern, not a specific repolarization waveform. So the T wave best represents ventricular repolarization.

Key idea: on an ECG, different waves correspond to different electrical events of the heart. Ventricular repolarization is when the ventricles reset electrically after contracting, and this shows up as the T wave. The P-wave reflects atrial depolarization, the QRS complex reflects ventricular depolarization, and NSR is a rhythm pattern, not a specific repolarization waveform. So the T wave best represents ventricular repolarization.