Abstract 5685: The First Human Experience With An Irrigated-tip Magnetic Catheter In Patients Undergoing Remote Ablation Of Atrial Fibrillation
Background: To report the first human experience on remote magnetic irrigated-tip catheter ablation.
Methods: Catheter ablation by CPVA was remotely performed using an irrigated-tip magnetic catheter (ThermoCool NaviStar-RMT, Biosense Webster) connected with the Niobe II system (Stereotaxis, St. Louis, Missouri) in 29 patients (mean age 58.8±11.8 years; 22 males) with symptomatic drug-refractory atrial fibrillation (AF). The RF generator was set to power-control mode with a fixed power of 30 W. Procedural endpoints were feasibility, safety and acute efficacy of the catheter. Temperature tip, impedance change and power were continuously monitored from the onset to the end of RF applications.
Results: Procedural endpoints regardless of the type of AF were safely and successfully achieved in 27/29 patients while crossover to manual (1 patients) or 8 mm solid magnetic catheter (1 patient) was required to complete mitral isthmus line. The total procedure time was 70.5±7.4 min. The total ablation time was 30.7±7.1 min. Impedance values significantly decreased during RF applications (p<0.0001) and the maximum temperature on the catheter tip was 36.4 ± 0.8 °C. No acute complications occurred during and after the procedure. At 6±2 months 27/29 patients had no AF recurrences and postablation AT did not develop in any patient.
Conclusions: Remote ablation with irrigated-tip magnetic catheters is safe feasible and effective resulting in PV isolation in 100% of the PVs. Completeness and confirmation of mitral isthmus conduction block was easily achieved, rarely requiring crossover to manual or solid magnetic catheters. Longer follow-up is required to confirm short-term efficacy of remore magnetic irrigated-tip catheter ablation.