Safety and Efficacy of EasyCool Catheter

Inclusion Criteria: * Patients requiring intracardial RF- Ablation with irrigated catheter Exclusion Criteria: * Absence of patient´s consent; * Age \<12 years; * Pregnancy or breast-feeding women; * Acute local infection; * Acute systemic infection; * Atrial thrombosis or myxoma - the transseptal approach is contraindicated in patients with left atrial thrombus; * Existence of active Implants (Pacemaker, Defibrillator etc.); * Hemodynamic instability; * Hypercoagulability; * Inadequate tissue damaged e.g. by radiation or suppuration; * Obstruction of the artery or vein selected for insertion; * Patients with artificial heart valve: the use of intracardial catheters is not advised; * Physiologic or anatomic abnormalities that could cause postoperative complications e.g. aneurysms in the application area, bleeding diathesis, decreased resistance to infections; * Previously diagnosed spasms of the coronary arteries; * Recurrent metastasizing cancer; * Sepsis; * Severe concomitant illness for which an increase or surgery time is associated with a significant increased risk; * Thrombosis of the leg veins and the deep pelvic vein.