Which statement correctly identifies the P Wave in relation to atrial activity?

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Multiple Choice

Which statement correctly identifies the P Wave in relation to atrial activity?

Explanation:
The P wave represents atrial depolarization, the electrical activity that triggers atrial contraction as the impulse spreads through the atria. This wave appears before the QRS complex because atrial depolarization happens prior to ventricular depolarization. The QRS complex then reflects ventricular depolarization, and the T wave shows ventricular repolarization. Atrial repolarization does occur but is masked by the QRS complex and not seen as a distinct wave on a normal ECG.

The P wave represents atrial depolarization, the electrical activity that triggers atrial contraction as the impulse spreads through the atria. This wave appears before the QRS complex because atrial depolarization happens prior to ventricular depolarization. The QRS complex then reflects ventricular depolarization, and the T wave shows ventricular repolarization. Atrial repolarization does occur but is masked by the QRS complex and not seen as a distinct wave on a normal ECG.

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