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- Title
Spontaneous Dissociated Firing from the Pulmonary Veins during Ablation of Paroxysmal Atrial Fibrillation: Implications and Impact on Arrhythmia-Free Survival.
- Authors
HUSSEIN, AYMAN A.; OZAKI, ASUKA; MARTIN, DAVID O.; BHARGAVA, MANDEEP; BARANOWSKI, BRYAN; DRESING, THOMAS; CALLAHAN, THOMAS; KANJ, MOHAMED; TCHOU, PATRICK; NATALE, ANDREA; LINDSAY, BRUCE D.; SALIBA, WALID I.; WAZNI, OUSSAMA M.
- Abstract
Background Following pulmonary vein isolation (PVI) for the treatment of paroxysmal atrial fibrillation (AF), spontaneous dissociated firing (DiFi) from the isolated veins may be observed. Little is known about the significance and prognostic implications of this phenomenon. We sought to determine the relationship between DiFi and ablation outcomes. Methods The study population consisted of 156 paroxysmal AF patients who underwent first time PVI and were found to have spontaneous DiFi from the pulmonary veins (PVs). Their outcomes were compared to a population of 156 propensity-matched controls from our prospectively maintained AF ablation data registry. Results DiFi was most frequently observed from the right superior PV and occurred in 89 patients (57.1%). After 24 months of follow-up, patients with DiFi had better success rates compared to those with silent veins after isolation (88.5% vs 75%, P = 0.002). The overall distribution of types of recurrent arrhythmia was similar between DiFi patients and their matched controls (P = NS). During repeat ablations, DiFi patients were less likely to have PV conduction recovery (60% vs 93.3%, P = 0.02). Importantly, none of the veins with DiFi during index procedures was found to have conduction recovery. Conclusion In patients with paroxysmal AF undergoing ablation, DiFi from the PVs after their isolation was associated with improved ablation outcomes. It is possible that DiFi is an indicator of successful durable isolation of the PVs. The findings suggest that confirmation of exit block may be warranted to improve AF ablation outcomes.
- Subjects
ARRHYTHMIA prevention; CATHETER ablation; HEALTH outcome assessment; TREATMENT effectiveness; CONTROL groups
- Publication
Pacing & Clinical Electrophysiology, 2013, Vol 36, Issue 8, p988
- ISSN
0147-8389
- Publication type
Article
- DOI
10.1111/pace.12131