Atrioventricular node reentrant tachycardia in patients with a long fast pathway effective refractory period: clinical features, electrophysiologic characteristics, and results of radiofrequency ablation

Szu-Chih Lee, Soul-Chin Chen, Tai Chingtai, C. E. Chiang, Zu Chin Wen, Yi-Jen Chen, Wen-Liang Yu, Ann Ning Fong, Jhen-Sheng Huang, Jun Jack Cheng, M S Chang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Twenty-two patients (group 1) with AV node reentrant tachycardia and a baseline fast pathway effective refractory period (ERP) > or = 500 msec were compared with 30 consecutive patients (group 2) with AV node reentrant tachycardia and a fast pathway ERP < 500 msec. Both groups underwent slow pathway ablation. In the patients with complete elimination of slow pathway, the fast pathway ERP and shortest 1:1 conduction cycle length shortened significantly after ablation but was greater in group 1 (n = 14) than in group 2 (n = 21) (125 +/- 78 msec vs 48 +/- 29 msec, p < 0.001 and 103 +/- 72 msec vs 52 +/- 30 msec, p < 0.001, respectively). In group 1, the shortening of fast pathway ERP was correlated to baseline difference between anterograde fast and anterograde slow ERP (r = 0.806, p < 0.001, slope = 1.08), and the shortening of fast pathway shortest 1:1 conduction cycle length was correlated to baseline difference between anterograde fast and anterograde slow shortest 1:1 conduction cycle length (r = 0.885, p < 0.001, slope = 1.47). During follow-up bradycardia did not develop in any patient and no one required pacing. This shortening of the fast pathway ERP and shortest 1:1 conduction cycle length after complete elimination of slow pathway reduced the concern of subsequent impairment of AV node conduction.

Original languageEnglish
Pages (from-to)387-94
Number of pages8
JournalAmerican Heart Journal
Volume134
Issue number3
DOIs
Publication statusPublished - Sep 1997
Externally publishedYes

Keywords

  • Adrenergic beta-Agonists
  • Adult
  • Aged
  • Catheter Ablation
  • Female
  • Heart Conduction System
  • Humans
  • Isoproterenol
  • Male
  • Middle Aged
  • Tachycardia, Atrioventricular Nodal Reentry
  • Journal Article
  • Research Support, Non-U.S. Gov't

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