PMID: 737095Dec 1, 1978Paper

Atypical Wenckebach periodicity simulating Mobitz II AV block

British Heart Journal
N El-SherifR Lazzara

Abstract

Eleven patients were studied and a total of 144 Wenckebach cycles in the AV node and 118 Wenckebach cycles in the His-Purkinje system were analysed to determine the incidence of typical and atypical Wenckebach periodicity, with particular emphasis on one variant of atypical Wenckebach that may simulate a Mobitz type II block. This pseudo-Mobitz II pattern was defined as a long Wenckebach cycle in which, at least, the last three beats of the cycle show relatively constant PR intervals (variation of no more than 0.02 s in surface leads and no more than 10 ms in His bundle electrograms) and in which the PR interval immediately following the blocked beat is shorter than the PR interval before the block by 0.04 s or more. Atypical Wenckebach cycles were found to be more common than the typical variety at both the AV node (67%) and His-Purkinje system (69%). The pseudo-Mobitz II pattern was seen in 19 per cent of atypical AV nodal Wenckebach periods and in 17 per cent of atypical His-Purkinje system Wenckebach cycles. The need to discern a 'classical' Mobitz II block from a pseudo-Mobitz II pattern, especially in the setting of an acute inferior myocardial infarction, is emphasised.

References

Jan 1, 1975·American Heart Journal·P DenesK M Rosen
Mar 1, 1975·The American Journal of Cardiology·N El-SherifR LAzzara
Jan 1, 1975·Journal of Electrocardiology·J R WennemarkV J Ruesta
Jan 1, 1975·Journal of Electrocardiology·H S FriedmanJ I Haft
Sep 1, 1973·Cardiovascular Research·A I Schaffer, N P Depasquale
Feb 1, 1974·The American Journal of Cardiology·S S Barold, H D Friedberg
Jan 1, 1972·Journal of Electrocardiology·B K YehN DeGuzman
Dec 1, 1971·Circulation·K M RosenS H Rahimtoola
Nov 1, 1970·Circulation·K M RosenR M Gunnar
Feb 1, 1971·Circulation Research·P F Cranefield, B F Hoffman
May 1, 1971·The American Journal of Cardiology·C CastilloA Castellanos
Jan 1, 1969·Circulation·B J ScherlagA N Damato
Nov 1, 1958·The American Journal of Cardiology·W DRESSLER, S L SWILLER
Jan 1, 1943·British Heart Journal·M Campbell

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Citations

Jun 1, 2000·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·C L ShenP L Chen
Dec 12, 2012·Herzschrittmachertherapie & Elektrophysiologie·S Serge Barold, Bengt Herweg
Mar 16, 2002·Comprehensive Therapy·S Serge Barold
Jan 13, 2001·Mayo Clinic Proceedings·S S Barold, D L Hayes
Jan 27, 2012·Annals of Noninvasive Electrocardiology : the Official Journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·S Serge BaroldBengt Herweg
Feb 25, 2014·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Mitsuharu KawamuraMelvin M Scheinman
Sep 15, 1991·The American Journal of Cardiology·D H Spodick
Feb 21, 2018·Clinical Cardiology·S Serge Barold
Sep 1, 1979·Circulation·D P Zipes

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