Retrograde P waves

Retrograde P waves occur when the impulse travels back up through the atria from an origin in the AV node or below. These waves can occur before, during or after a QRS complex. They may be inverted.eg transient PR prolongation after retrograde impulse from PVC, or RP interval with 2 alternative AV nodal pathways…

Featured Example

References

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  • See also: P wave
  • Irregularly irregular rhythms:

ECG Library (15)

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In the ECGquest archives, this ECG has been tagged with: - 12-Lead Incorrect Machine Interpretation Inverted P waves Narrow QRS Retrograde P waves Short PR Accelerated junctional rhythm Dr Smith's ECG Blog CC BY-NC
What is going on here?? (The computer called it “STEMI” and “Intraventricular Conduction Delay”!!)
In the ECGquest archives, this ECG has been tagged with: - Hypotension Weakness 12-Lead Normal Axis Retrograde P waves Junctional escape ECG Guru CC-BY-NC-SA
Instructors’ Collection ECG: Junctional or Low Atrial Rhythm
In the ECGquest archives, this ECG has been tagged with: - 12-Lead Retrograde P waves Wide QRS Accelerated idioventricular rhythm Acute Anterior MI Dr Smith's ECG Blog CC BY-NC
I saw this on the computer. Most physicians, at first glance, get this wrong. What is it?

This ECG is from a patient of unknown age who presented with chest pain. This ECG was recorded when they became hypotensive after a mid-LAD occlusion was opened and stented.

This ECG shows AIVR with borderline excessive discordant ST elevation in V2. The cause was the anterior MI.

In the ECGquest archives, this ECG has been tagged with: - Palpitations 12-Lead Narrow QRS Regular Retrograde P waves Tachycardia AVRT orthodromic Wolff Parkinson White syndrome ECG Guru CC-BY-NC-SA
Supraventricular Tachycardia in Pediatric Patient With Wolff-Parkinson-White Syndrome