Repolarization of atrial muscle occurs during which ECG component?

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Multiple Choice

Repolarization of atrial muscle occurs during which ECG component?

Explanation:
Repolarization of atrial muscle happens while the ventricles are depolarizing, so it occurs during the QRS complex. The QRS complex is the large deflection that represents ventricular depolarization, and any atrial repolarization signal is small and masked underneath it, making it not visible as a separate wave. By contrast, the P wave shows atrial depolarization, the T wave shows ventricular repolarization, and the QT interval covers the period from the start of ventricular depolarization to the end of ventricular repolarization.

Repolarization of atrial muscle happens while the ventricles are depolarizing, so it occurs during the QRS complex. The QRS complex is the large deflection that represents ventricular depolarization, and any atrial repolarization signal is small and masked underneath it, making it not visible as a separate wave. By contrast, the P wave shows atrial depolarization, the T wave shows ventricular repolarization, and the QT interval covers the period from the start of ventricular depolarization to the end of ventricular repolarization.

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