Which segment on the ECG corresponds to the delay at the AV node?

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Multiple Choice

Which segment on the ECG corresponds to the delay at the AV node?

Explanation:
The delay at the AV node is represented by the PR segment. After atrial depolarization finishes (the P wave), the impulse travels through the AV node where it slows down to allow the ventricles to fill. This slowing shows up as the flat, isoelectric PR segment just before the start of ventricular depolarization (the QRS complex). The QRS complex then reflects rapid ventricular depolarization, and the T wave represents ventricular repolarization. So, the portion of the ECG that corresponds to AV nodal delay is the PR segment.

The delay at the AV node is represented by the PR segment. After atrial depolarization finishes (the P wave), the impulse travels through the AV node where it slows down to allow the ventricles to fill. This slowing shows up as the flat, isoelectric PR segment just before the start of ventricular depolarization (the QRS complex). The QRS complex then reflects rapid ventricular depolarization, and the T wave represents ventricular repolarization. So, the portion of the ECG that corresponds to AV nodal delay is the PR segment.

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