Effects of Slow Pathway Ablation on Fast Pathway Function in Patients with Atrioventricular Nodal Reentrant Tachycardia

DOI Web Site Web Site 被引用文献2件

抄録

<jats:p><jats:bold>Effects of Slow Pathway Ablation. </jats:bold><jats:bold> Introduction: </jats:bold> This study investigated whether fast pathway conduction properties are altered by slow pathway ablation in patients with AV nodal reentrant tacbycardia.</jats:p><jats:p><jats:bold>Methods and Results: </jats:bold> Forty consecutive patients who underwent successful ablation of the slow pathway were prospective subjects for the study. Isoproterenol was used to enhance conduction and to differentiate interactive mechanisms. Potential electrotonic interactions were assessed by comparing patients with and those without residual dual AV node pbysiology after slow pathway ablation. Paired and unpaired <jats:italic>t</jats:italic>‐tests were used when appropriate. P < 0.05 was considered statistically significant. In the entire study population, heart rates were not significantly different before and after slow pathway ablation (RR = 770 ± 114 msec before and 745 ± 99 msec after, P = 0.07). Anterograde fast pathway conduction properties were unchanged after slow pathway ablation (effective refractory period, 348 ± 84 msec before and 336 ± 86 msec after, P = 0.13; shortest 1:1 conduction, 410 ± 93 msec before and 400 ± 82 msec after, P = 0.39). Retrograde fast pathway characteristics also were similar before and after ablation. Neither anterograde nor retrograde last pathway conduction properties during isoproterenol infusion were changed by slow pathway ablation. When the study population was further divided into patients with (n= 13) or without (n = 27) residual dual AV node pbysiology, no significant change was detected in fast pathway function in either group after slow patbway ablation.</jats:p><jats:p><jats:bold>Conclusions: </jats:bold> Fast pathway conduction characteristics were not affected by slow pathway ablation. In patients with AV nodal reentrant tachycardia, observations suggest that fast and slow pathways are functionally distinct.</jats:p>

収録刊行物

被引用文献 (2)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ