In a junctional rhythm, which statement about the P waves is true?

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Multiple Choice

In a junctional rhythm, which statement about the P waves is true?

In a junctional rhythm, the impulse starts in the AV node or just below it, so atrial activation often occurs after ventricular activation or is retrograde. That makes the P waves either inverted or appear late relative to the QRS complex, and sometimes they’re hidden within or immediately after the QRS. So P waves being inverted or late best describes what happens in this rhythm. If the P waves preceded the QRS with a normal PR interval, that would point to a sinus or atrial origin with intact AV conduction, not a junctional rhythm. P waves being absent or tall and peaked don’t fit the typical pattern of junctional atrial activation.

In a junctional rhythm, the impulse starts in the AV node or just below it, so atrial activation often occurs after ventricular activation or is retrograde. That makes the P waves either inverted or appear late relative to the QRS complex, and sometimes they’re hidden within or immediately after the QRS. So P waves being inverted or late best describes what happens in this rhythm. If the P waves preceded the QRS with a normal PR interval, that would point to a sinus or atrial origin with intact AV conduction, not a junctional rhythm. P waves being absent or tall and peaked don’t fit the typical pattern of junctional atrial activation.

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