Irrigated DiamondTemp catheter and return to ablation under temperature control. First Polish experience with DiamondTemp catheter in pulmonary vein isolation.

We present the first Polish experience with ablation performed using DiamondTemp catheter. The study was conducted with 3 male patients diagnosed with atrial fibrillation (AF). In the first 2 patients typical transseptal punctures were performed, followed by mapping with the Advisor catheter and EnSite-Precision system. One patient had a residual atrial septal leak, therefore ablation without fluoroscopy was attempted. High-power, short-duration ablation under temperature control was performed around pulmonary vein (PV) ostia. The power was 49-53 W, the temperature was 45-48 C. Duration of procedures/fluoroscopy were: 146/8.9, 177/5.9, 132/0.0 min. In the reference group, 10 recent AF identical ablation procedures performed with traditional equipment resulted in 143.027.0/6.04.4 min. Duration of DiamondTemp applications were 14.7, 32.7, 30.8 min (reference group 37.3 11.4 min). Procedural endpoints were achieved in all but one patient with incomplete isolation of the low segment of the right inferior PV. There were no procedural complications noted. In conclusion, the DiamondTemp saline-irrigated catheter is safe and effective for high-power short-duration ablation in patients with AF. Furthermore, this technology makes it possible to complete the procedure without fluoroscopy. However these findings must be confirmed in larger group of patients.