Premature junctional complex: Difference between revisions
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==ECG Findings== | ==ECG Findings== | ||
*P wave | *P wave is either: | ||
**Absent | **Absent | ||
**Abnormal | **Abnormal with PR < 120ms | ||
**Retrograde | **Retrograde, which may be inverted in inferior leads | ||
*PJC arrives before next sinus beat | *PJC arrives before next sinus beat | ||
*Followed by compensatory pause | *Followed by compensatory pause | ||
Revision as of 00:42, 8 March 2019
ECG Findings
- P wave is either:
- Absent
- Abnormal with PR < 120ms
- Retrograde, 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 (short PR)
- May be seen in healthy individuals with no clinical significance
- Or in pathology such as valvular disease, drug toxicity, electrolyte disorder
