Functional bundle branch block and orthodromic reciprocating tachycardia cycle length: Do not bet on accessory pathway location

Fabrice Extramiana, Seiji Takatsuki, Meiso Hayashi, Antoine Leenhardt

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Aims: To show 2 examples in which the analysis of the effect of bundle branch block on orthodromic reciprocating tachycardia cycle length was misleading. Methods and results: We performed an electrophysiological study in two patients with orthodromic reciprocating tachycardia showing a transition from wide to narrow QRS during tachycardia. Our two cases of left bundle branch block during reciprocating tachycardia using infero-septal pathways show that ventricular to atrial conduction time prolongation may be larger than 30 ms and may be concealed by a shortening of atrial to ventricular conduction time. In the 2 cases, the atrial insertion of the accessory pathway could be successfully ablated from the right atria at the ostium of the coronary sinus. Conclusions: The observation of the association between left bundle branch block and cycle length prolongation during reciprocating tachycardia may be associated with a successful ablation at the ostium of the coronary sinus.

Original languageEnglish
Pages (from-to)920-922
Number of pages3
JournalEuropace
Volume9
Issue number10
DOIs
Publication statusPublished - 2007 Oct 1
Externally publishedYes

Keywords

  • Ablation
  • Accessory pathway
  • Bundle branch block

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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