Catheter ablation of Atrial Flutter has become an accepted alternative to pharmacologic therapy.The current guidelines recommend the catheter ablation at the first episode of AFL (Class IIa) or in any case of recurrent episodes of AFL (Class I). Recent studies have already demonstrated a high degree of procedural efficacy (higher than 90%). However, there are still two main areas of investigation. First, what is the best method to obtain an effective lesion. Second, what is the most reliable method to validate the procedure success.The present study is aimed at investigating these aspects in the current Italian clinical practice.