Arrhythmias & electrophysiology
Clinical/electrophysiologic characteristics of infranodal Wenckebach in patients with indication for permanent ventricular pacing: A prospective study
Authors' conclusion
Of patients referred for pacemaker implantation, infranodal Wenckebach was present in 27.5% (11/40) without complete AV block. It was as frequent as AV nodal Wenckebach and associated with characteristic electrophysiologic findings.
Study context
- Population
- Patients with an indication for permanent ventricular pacing undergoing preimplantation electrophysiologic study22 with atrioventricular (AV) Wenckebach
- Participants
- 163 patients
- Exposure
- Infranodal vs AV nodal Wenckebach
- Infranodal Wenckebachn = 12
- AV nodal Wenckebachn = 10reference
- Outcome
- Prevalence of AV Wenckebach and its type
Methodological details2-year period; ventricular pacing percentage evaluated at 6-month follow-up
- 2-year period; ventricular pacing percentage evaluated at 6-month follow-up
Main finding
As reported in the abstract
- Any AV Wenckebach
- 22 (13.4%)
- Infranodal Wenckebach among patients without complete AV block
- 27.5% (11/40)
Observational data: associations, not effects.
Further findings
Clinical/electrophysiologic characteristics, infranodal vs AV nodal · LVEF ≤40%
P = 0.04
Clinical/electrophysiologic characteristics, infranodal vs AV nodal · isolated first-degree AV block
P = 0.02
Clinical/electrophysiologic characteristics, infranodal vs AV nodal · RBBB with left anterior fascicular block
P = 0.003
| Outcome | P value |
|---|---|
| Clinical/electrophysiologic characteristics, infranodal vs AV nodalMedian HV interval: 90 vs 49 ms | P = 0.005 |
| Clinical/electrophysiologic characteristics, infranodal vs AV nodalPR increment at onset of AV Wenckebach: 20.5 vs 80 ms | P = 0.002 |
| Clinical/electrophysiologic characteristics, infranodal vs AV nodalOnset of 2:1 AV block at longer cycle lengths: 91.7% vs 20% | P = 0.002 |
Original publication
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