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Caiyi Lu

PLA General Hospital, China

Title: Ablation dot number at pulmonary vein antrum is related to the longterm efficacy of paroxysmal atrial fibrillation

Biography

Biography: Caiyi Lu

Abstract

Objective  Evaluate the relationship between ablation dot number at pulmonary vein antrum (PVA)  and longterm efficacy of paroxysmal atrial fibrillation (PAF).

Methods  Parients with PAF history more than 6 minths were selected to isolate pulmonary veins (PV) at PVA. 3D mapping system (Carto-C3) and coolflow catheter (SmarTouch) were used to make the shell of atrium-PVA and ablation cicle around PVA. Superior and inferior PVAs were ablated by single ablation circle. Maxmal pependicular diameters of the circle were measured. The ablation dot on the circle was counted and divided by the sum of two maximal cicle diameters. Ablation dot number was defined as addition of left and right PVA ablation dot number. PVA isolation was defined as complete disappear of PV potential. PAF longterm efficacy was evaluated by regular clinical check and Hoter monitering at 6 and 12 months after procedure.

Results  160 patients with PAF (65.7+-8.6 yrs, male 110) and with PAF history of 15.7+-9.3 months were enrolled into the study. All PVs in each patient were isolated successfully by single procedure. Ablation dot number per circle and per patient was 32.6+-7.3 and 61.7+-9.1 respectively. During the follow up of 16.5+-3.3 months, 131 patients (81.9ï¼…) were free of PAF. PAF was recurrence in 29 patients (18.1ï¼…) in 4.2+-2.7 months after procedure. Ablation dot number was singnificantly different between patients with and without PAF recurrence (56.3+-5.7 vs 63.8+-7.1, P<0.01).

Conclusions  Ablation dot number around PVA is positively related to the longterm efficacy of PAF. Dot creation per patient more than 63 singnificantly decreases PAF recurrence.