Complex electrophysiological characteristics in atrioventricular nodal reentrant tachycardia with continuous atrioventricular node function curves

Ching T. Tai, Shih A. Chen, Chern E. Chiang, Shih Huang Lee, Zu C. Wen, Chuen Wang Chiou, Kwo Chang Ueng, Yi J. Chen, Wen Chung Yu, Jin Long Huang, Mau Song Chang

研究成果: 雜誌貢獻文章同行評審

59 引文 斯高帕斯(Scopus)

摘要

Background: Although typical atrioventricular nodal reentrant tachycardia (AVNRT) with discontinuous AV node function curves has been well studied, there has been a lack of any significant information about AVNRT without evidence of dual AV nodal pathway physiology during atrial extrastimulus testing or atrial pacing. Methods and Results: Group I included 9 patients with continuous curves during atrial extrastimulus testing but without a jump (≤50 ms) of the atrial-His bundle (AH) interval daring incremental atrial pacing. The maximal AH interval during atrial pacing (266±61 versus 168±27 ms, P=.007) or extrastimulus testing (290±60 versus 176±18 ms, P=.005) shortened significantly after ablation. Antegrade and retrograde AV node properties were similar before and after ablation. Group 2 included 14 patients with continuous curves and a jump of the AH interval during incremental atrial pacing. The atrial pacing cycle length with 1:1 AV conduction and effective refractory period (ERP) of the antegrade AV node increased significantly, whereas the maximal AH interval daring atrial pacing (358±70 versus 203±28 ms, P=.001) or extrastimulus testing (338±75 versus 196±34 ms, P=.002) shortened significantly after ablation. Group 3 included 24 patients with discontinuous curves. The maximal AH interval during atrial pacing or extrastimulus testing and the ERP of the antegrade fast AV node shortened, whereas the ERP of the antegrade AV node increased significantly after ablation. The maximal AH interval before ablation, extent of decrease in maximal AH interval after ablation, ERP of the retrograde AV node before ablation, and tachycardia cycle length were significantly shorter in group 1 than groups 2 and 3. Conclusions: In AVNRT with continuous AV node function curves, dual AV nodal pathway physiology may or may not be demonstrated during atrial pacing. Significant shortening of the maximal AH interval during atrial pacing after radiofrequency ablation suggests successful elimination of AVNRT.

原文英語
頁(從 - 到)2541-2547
頁數7
期刊Circulation
95
發行號11
出版狀態已發佈 - 1997
對外發佈Yes

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine

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