INTRODUCTION: Slow pathway (SP) conduction often persists following radiofrequency (RF) catheter ablation of @entity2917 ( @entity2917 ). An association between persistent SP conduction, as evidenced by discontinuous AV nodal conduction curves, and recurrent @entity591 has not been established. Of note, the segment of the curve attributable to SP conduction (the "window" of SP conduction) varies. This study examined whether the maximal post-ablation SP conduction window length differs in @entity1 who later have recurrent @entity591 when compared with those who do not recur. METHODS AND RESULTS: Electrophysiologic study data were compared in two groups who had undergone RF ablation of the SP for typical @entity2917 at a single center from 1992-1998. The groups, consisting of seven known recurrences (Group A) and 50 non-recurrences confirmed through a follow-up survey and phone contact (Group B), were similar in gender proportion, age, baseline electrophysiologic data, and number of RF deliveries. Four @entity1 (57%) from Group A and 26 (52%) from Group B exhibited discontinuous AV nodal conduction curves after ablation. The maximum post-ablation window lengths among @entity1 with dual AV nodal physiology varied widely and similarly in the two groups, and the means did not significantly differ (53 +/- 47 msec in Group A vs. 36 +/- 31 msec in Group B; p=0.36). CONCLUSION: Persistent SP conduction post-ablation in this series was a common finding not predictive of recurrence. No difference in the maximum SP conduction window post-ablation was evident between recurrences and non-recurrences.

The "window" of slow pathway conduction after ablation and recurrence of XXXX .

@entity591 :: ('MESH:D013610', 'Disease') :: ['tachycardia'] @entity1 :: ('9606', 'Species') :: ['patients'] @entity2917 :: ('MESH:D013611', 'Disease') :: ['AVNRT', 'atrioventricular nodal reentrant tachycardia']
@entity2917 :: (MESH:D013611,Disease) :: ['atrioventricular nodal reentrant tachycardia']
