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Article: Prevalence and significance of exit block during arrhythmias arising in pulmonary veins

TitlePrevalence and significance of exit block during arrhythmias arising in pulmonary veins
Authors
Issue Date2000
PublisherWiley-Blackwell Publishing, Inc.. The Journal's web site is located at http://www.wiley.com/bw/journal.asp?ref=1045-3873
Citation
Journal of Cardiovascular Electrophysiology, 2000, v. 11 n. 4, p. 379-386 How to Cite?
AbstractExit Block. Introduction: Recent studies described the occurrence of conduction block within pulmonary veins. The purpose of this study was to evaluate the prevalence of exit block during arrhythmias that arise in pulmonary veins. Methods and Results: Twenty-five patients with atrial tachycardia/fibrillation underwent successful ablation of 28 arrhythmogenic loci within a pulmonary vein. The prevalence of exit block in the pulmonary veins was determined in 28 arrhythmogenic pulmonary veins and 40 nonarrhythmogenic pulmonary veins. During isolated premature depolarizations, exit block in a pulmonary vein was observed at 50% of arrhythmogenic pulmonary vein sites and was never observed within pulmonary veins that did not generate a tachycardia (P < 0.01). During tachycardia, exit block from a pulmonary vein was observed in 61% of the arrhythmogenic pulmonary veins. The mean cycle length of the pulmonary vein tachycardias associated with exit block was significantly shorter than the cycle length of tachycardias that were not associated with exit block (163 ± 32 vs 251 ± 45 msec, P < 0.001). Exit block in two pulmonary veins during the same episode of tachycardia was observed in 3 of the 28 arrhythmogenic pulmonary veins (11%) in three different patients. Simultaneous recordings in the two pulmonary veins demonstrated bursts of tachycardia in both veins that were not synchronized. Radiofrequency catheter ablation of the arrhythmogenic site in one of the pulmonary veins eliminated spontaneous recurrences of tachycardia from the other pulmonary vein. Conclusion: Exit block from pulmonary veins is a common observation during tachycardias generated within pulmonary veins and indicates that an arrhythmogenic pulmonary vein has been identified. The occurrence of exit block in more than one pulmonary vein most likely is attributable to simultaneous tachycardias, one or both of which may be tachycardia induced and perpetuated by the other.
Persistent Identifierhttp://hdl.handle.net/10722/161627
ISSN
2015 Impact Factor: 3.097
2015 SCImago Journal Rankings: 1.863
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTse, HFen_US
dc.contributor.authorLau, CPen_US
dc.contributor.authorKou, Wen_US
dc.contributor.authorPelosi, Fen_US
dc.contributor.authorOral, Hen_US
dc.contributor.authorKim, Men_US
dc.contributor.authorMichaud, GFen_US
dc.contributor.authorKnight, BPen_US
dc.contributor.authorMoscucci, Men_US
dc.contributor.authorStrickberger, SAen_US
dc.contributor.authorMorady, Fen_US
dc.date.accessioned2012-09-05T05:13:14Z-
dc.date.available2012-09-05T05:13:14Z-
dc.date.issued2000en_US
dc.identifier.citationJournal of Cardiovascular Electrophysiology, 2000, v. 11 n. 4, p. 379-386en_US
dc.identifier.issn1045-3873en_US
dc.identifier.urihttp://hdl.handle.net/10722/161627-
dc.description.abstractExit Block. Introduction: Recent studies described the occurrence of conduction block within pulmonary veins. The purpose of this study was to evaluate the prevalence of exit block during arrhythmias that arise in pulmonary veins. Methods and Results: Twenty-five patients with atrial tachycardia/fibrillation underwent successful ablation of 28 arrhythmogenic loci within a pulmonary vein. The prevalence of exit block in the pulmonary veins was determined in 28 arrhythmogenic pulmonary veins and 40 nonarrhythmogenic pulmonary veins. During isolated premature depolarizations, exit block in a pulmonary vein was observed at 50% of arrhythmogenic pulmonary vein sites and was never observed within pulmonary veins that did not generate a tachycardia (P < 0.01). During tachycardia, exit block from a pulmonary vein was observed in 61% of the arrhythmogenic pulmonary veins. The mean cycle length of the pulmonary vein tachycardias associated with exit block was significantly shorter than the cycle length of tachycardias that were not associated with exit block (163 ± 32 vs 251 ± 45 msec, P < 0.001). Exit block in two pulmonary veins during the same episode of tachycardia was observed in 3 of the 28 arrhythmogenic pulmonary veins (11%) in three different patients. Simultaneous recordings in the two pulmonary veins demonstrated bursts of tachycardia in both veins that were not synchronized. Radiofrequency catheter ablation of the arrhythmogenic site in one of the pulmonary veins eliminated spontaneous recurrences of tachycardia from the other pulmonary vein. Conclusion: Exit block from pulmonary veins is a common observation during tachycardias generated within pulmonary veins and indicates that an arrhythmogenic pulmonary vein has been identified. The occurrence of exit block in more than one pulmonary vein most likely is attributable to simultaneous tachycardias, one or both of which may be tachycardia induced and perpetuated by the other.en_US
dc.languageengen_US
dc.publisherWiley-Blackwell Publishing, Inc.. The Journal's web site is located at http://www.wiley.com/bw/journal.asp?ref=1045-3873en_US
dc.relation.ispartofJournal of Cardiovascular Electrophysiologyen_US
dc.subject.meshAdulten_US
dc.subject.meshAtrial Fibrillation - Complications - Physiopathology - Surgeryen_US
dc.subject.meshAtrial Premature Complexes - Complications - Physiopathologyen_US
dc.subject.meshCatheter Ablationen_US
dc.subject.meshElectrocardiographyen_US
dc.subject.meshFemaleen_US
dc.subject.meshHeart Conduction System - Physiopathology - Surgeryen_US
dc.subject.meshHeart Rateen_US
dc.subject.meshHumansen_US
dc.subject.meshMaleen_US
dc.subject.meshPrevalenceen_US
dc.subject.meshPulmonary Veins - Physiopathology - Surgeryen_US
dc.titlePrevalence and significance of exit block during arrhythmias arising in pulmonary veinsen_US
dc.typeArticleen_US
dc.identifier.emailTse, HF:hftse@hkucc.hku.hken_US
dc.identifier.authorityTse, HF=rp00428en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1111/j.1540-8167.2000.tb00332.x-
dc.identifier.pmid10809490-
dc.identifier.scopuseid_2-s2.0-0012835164en_US
dc.identifier.hkuros100609-
dc.identifier.hkuros49719-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0012835164&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume11en_US
dc.identifier.issue4en_US
dc.identifier.spage379en_US
dc.identifier.epage386en_US
dc.identifier.isiWOS:000086498300001-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridTse, HF=7006070805en_US
dc.identifier.scopusauthoridLau, CP=7401968501en_US
dc.identifier.scopusauthoridKou, W=7007035393en_US
dc.identifier.scopusauthoridPelosi, F=7004832991en_US
dc.identifier.scopusauthoridOral, H=7006855160en_US
dc.identifier.scopusauthoridKim, M=7406090815en_US
dc.identifier.scopusauthoridMichaud, GF=7006729860en_US
dc.identifier.scopusauthoridKnight, BP=7201940628en_US
dc.identifier.scopusauthoridMoscucci, M=7004313718en_US
dc.identifier.scopusauthoridStrickberger, SA=7005045293en_US
dc.identifier.scopusauthoridMorady, F=35431764400en_US
dc.customcontrol.immutablejt 130913-

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