Loss of Pace Capture on the Ablation Line During Pulmonary Vein Isolation vs. "Dormant Conduction": Is XXXX Expendable?

@entity1 @entity859 @entity47627 @entity358 @entity955 @entity943
INTRODUCTION: Permanent @entity358 ( @entity358 ) remains an essential goal of ablation therapy in @entity1 with @entity955 . Aim of this study was the intra-individual comparison of unexcitability to pacing along the ablation line vs. dormant conduction (DC) as additional procedural endpoints. METHODS: A total of 58 @entity1 with @entity955 ( @entity955 ) underwent @entity358 by circumferential ablation of ipsilateral pulmonary veins (PVs), followed by testing for DC by @entity859 administration. Irrespective of the presence of DC, pacing along the ablation line for left atrium capture was performed and additional radio frequency (RF) energy applied if necessary. PVs with initial DC were re-tested after achieving unexcitability. RESULTS: @entity358 was achieved in 224 of 224 PVs. In 33 of 224 PVs (15%) DC was revealed. At 92 of 112 ablation lines (82%) sites of excitability were found. Three (9%) of the initial 33 PVs with DC showed further DC after achieving unexcitability at repeated testing. 32 of 33 assumed areas of unmasked @entity47627 re-conduction as revealed by DC-testing showed a corresponding site of excitability on the ablation line. After a follow-up of 11.6  3.4 months 79% of @entity1 were free of @entity943 . CONCLUSIONS: Pacing for unexcitability can safely identify potential sites of DC and even sites that would have not been detected by testing for DC. Unexcitability therefore serves as a suitable and safe procedural endpoint not only for @entity1 with contraindications to @entity859 administration. Our data suggest that @entity859 may be expendable when achieving unexcitability along the ablation line. This article is protected by copyright. All rights reserved.
