Rate-Dependent And Unidirectional Conduction Block Between The Left Pulmonary Vein And Left Atrium After Catheter Ablation For Atrial Fibrillation
JOURNAL OF ARRHYTHMIA(2020)
摘要
A 77-year-old woman with symptomatic paroxysmal atrial fibrillation (PAF) underwent pulmonary vein isolation (PVI), but subsequently experienced recurrence. In the second session, unidirectional left atrium (LA)-left superior pulmonary vein (LSPV) conduction was revealed to exist at the carina of the LSPV. Left pulmonary vein (LPV) pacing performed in a cycle between 300 and 260 ms revealed rate-dependent pulmonary vein (PV)-LA conduction, and the location was estimated to be in the roof of the LSPV. PV isolation was achieved after ablation of two gaps. Consideration of the presence of rate-dependent gaps may be useful to confirm bidirectional block lines after ablation.
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关键词
atrial fibrillation, catheter ablation, pulmonary vein isolation, rate-dependent conduction, unidirectional conduction
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