Contact force at ablation points with acute pulmonary vein reconnection was significantly lower than at points without reconnection (7.5 g vs. 9.9 g; P < 0.0001).
Observational (n=57)
No
Does the optimal contact force to prevent acute pulmonary vein reconnection vary by region during catheter ablation for atrial fibrillation?
Optimal contact force to prevent acute pulmonary vein reconnection during AF ablation varies significantly depending on the specific peri-pulmonary vein segment, ranging from 10 to 22 g.
Tasa de eventos absoluta: 7.5% vs 9.9%
valor p: p=< 0.0001
BACKGROUND: Regional differences in optimal contact force (CF) to prevent acute pulmonary vein reconnection (APVR) during catheter ablation for atrial fibrillation (AF) remain unclear. OBJECTIVE: The purpose of this study was to evaluate regional difference in optimal CF during AF ablation. METHODS: This single-center observational study evaluated data from 57 consecutive drug-refractory AF patients (mean age, 62 ± 11 years; 43 males) who underwent initial pulmonary vein isolation (PVI) using the THERMOCOOL® SMARTTOUCH™ (Biosense Webster, Diamond Bar, CA, USA) catheter from June to August 2013. APVR was defined as the time-dependent reconnection >20 minutes after initial PVI and/or reconnection evoked by intravenous adenosine administration (20 mg). Point-by-point relationships between the reconnected points and their CF values were evaluated. RESULTS: Total 72 gaps causing APVR were observed. Of a total of 4,421 ablation points, 285 (6.4%) were associated with APVR. The average CF value of the points with APVR was significantly lower than that of those without (APVR vs. no APVR; 7.5 ± 6.7 g vs. 9.9 ± 8.4 g; P 95% probability was 10-22 g, depending on the individual peri-PV segments.
Sotomi et al. (Thu,) conducted a observational in Atrial fibrillation (n=57). Radiofrequency catheter ablation with contact force sensing was evaluated on Acute pulmonary vein reconnection (APVR) (p=< 0.0001). Contact force at ablation points with acute pulmonary vein reconnection was significantly lower than at points without reconnection (7.5 g vs. 9.9 g; P < 0.0001).
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