Abstract 16675: Rapid Pulmonary Vein Isolation Using a Novel Diamond Tip Temperature Controlled Irrigated RF Catheter: First-in-man Clinical Experience

Introduction: A novel irrigated RF catheter with a diamond tip (for rapid cooling by virtue of its high thermal diffusivity) and six surface thermocouples (that reflect tissue temperature) allows one to perform rapid temperature-controlled irrigated ablation (DiamondTemp; ACT, Inc.). High resolution-electrograms (EGM) from its split-tip electrode allows for rapid lesion assessment. We sought to prospectively determine this approach by evaluating its use during pulmonary vein (PV) isolation. Methods: Thirty-five patients (24 men, 60±10 years) with symptomatic, drug-refractory AF were prospectively enrolled at a single center (Grp1). Point-by-point PV isolation was performed in temperature-control mode (60°C/50W) until a 75-80% reduction in the split-tip EGM amplitude. Outcomes were compared with a historical control group undergoing PV isolation with a Thermocool irrigated catheter (n=35; Grp2). At 3 months, patients underwent a remapping procedure regardless of symptomatology. Results: All PVs were succes...