Premature junctional complex: Difference between revisions
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*PJC arrives before next sinus beat | *PJC arrives before next sinus beat | ||
*Followed by compensatory pause | *Followed by compensatory pause | ||
*From AV node region | *From AV node region, with ventricular response usually normal, so QRS complexes usually narrow | ||
*If conduction abnormal, may have RBBB morphology | *If conduction abnormal, may have RBBB morphology | ||
Revision as of 21:16, 7 March 2016
EKG Findings
- P wave be either:
- Absent
- Abnormal P wave with short PR < 120ms
- Retrograde P waves, which may be inverted, in inferior leads
- PJC arrives before next sinus beat
- Followed by compensatory pause
- From AV node region, with ventricular response usually normal, so QRS complexes usually narrow
- If conduction abnormal, may have RBBB morphology
Clinical Significance
- Less common than PVCs or PACs
- Differentiate from WPW
- May be seen in healthy individuals with no clinical significance
- Or in pathology such as valvular disease, drug toxicity, electrolyte disorder
Sources
- Amal Mattu. Mattu ECG Case: Feb 5 2012. Published Apr 9, 2012. UMEmergencyMed. https://www.youtube.com/watch?v=Sb8JozMnxpI.
- Burns E. Premature Junctional Complexes. LifeInTheFastLane. http://lifeinthefastlane.com/ecg-library/pjc/