Typical Atrial Flutter, Ablation Index and Point by Point Ablation

Inclusion criteria: * paroxysmal, persistent and /or long standing atrial flutter even in the presence of structural heart disease * Informed consent form * Age equal or above 18 years * Skilled and willing to comply with all tests and follow up requirements * Patients that ,in the context of ablation for fibrillation atrial, should also undergo to typical flutter ablation: in this case the data collected will be those related to typical flutter ablation. Exclusion Criteria: * Previous ablation for atrial flutter * Atrial flutter secondary to electrolyte imbalance, thyroid disease or to a reversible or non-cardiac cause * severe anemia, * sepsis in progress * Bypass procedure with coronary arterial artery in the last three months * Pending cardiac transplantation or other cardiac surgery * Pregnant or breastfeeding women * Acute disease or active systemic infection or sepsis * Documented left atrial thrombus * Unstable angina * Uncontrolled heart failure * Life expectancy of less than 12 months * Registration in any other study evaluating another device or medication * Presence of intramural thrombi, tumor or other anomalies that preclude the introduction of the catheter into the vein system