Accelerated junctional rhythm is associated with which P wave morphology?

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Multiple Choice

Accelerated junctional rhythm is associated with which P wave morphology?

The key idea is that where the heartbeat starts determines how the atria depolarize. When the impulse comes from the AV junction, atrial activation happens retrograde (back toward the atria). That retrograde activation produces P waves that are inverted in the standard leads, and they may appear after the QRS complex or be hidden within it. This is why accelerated junctional rhythm typically shows inverted or late P waves. Normal P waves indicate a sinus origin (SA node), while absent P waves can occur with certain blockages or when atrial activity is hidden, and biphasic P waves aren’t the characteristic pattern for an AV-junction source.

The key idea is that where the heartbeat starts determines how the atria depolarize. When the impulse comes from the AV junction, atrial activation happens retrograde (back toward the atria). That retrograde activation produces P waves that are inverted in the standard leads, and they may appear after the QRS complex or be hidden within it. This is why accelerated junctional rhythm typically shows inverted or late P waves.

Normal P waves indicate a sinus origin (SA node), while absent P waves can occur with certain blockages or when atrial activity is hidden, and biphasic P waves aren’t the characteristic pattern for an AV-junction source.

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