Efficacy of Transcatheter Radiofrequency Ablation of Atrial Flutter With Standard Irrigated Catheter With Flexible Tip

Inclusion Criteria: * Both sexes; age\>18 yrs * ECG documentation of at least 2 episodes of common atrial flutter or evidence of ongoing atrial flutter. * No contraindications to transcatheter radiofrequency ablation by a standard 4mm irrigated flexible tip catheter * Patients willing to accept the tests and to follow standard procedures * Patients who understand the nature of the procedure and who are willing to participate and to sign the informed consent before enrollment Exclusion Criteria: * Atrial fibrillation * Any arrhythmia requiring antiarrhythmics in the 6 months post procedure * Intra atrial thrombosis * NYHA class IV * Unstable Angina or Acute Myocardial Infarction (AMI) in the last 3 month * Untreated Wolf Parkinson White syndrome * Contraindications to oral anticoagulation * Life expectancy \< 12 month * Major surgery or interventional procedure already planned in the 6 month following ablation * Pregnancy or breast-feeding * Participation in another study