Isthmus Ablation With Gold Electrode for Treatment of Atrial Flutter (AURUM 8)

Inclusion Criteria: * At least one electrocardiogram (ECG)-documented (can be older than 3 months), symptomatic, typical atrial flutter episode with either negative, sawtooth-shaped P-waves in leads II, III, and augmented voltage foot (aVF), or positive P-waves in leads II, III, and aVF * At least one persistent, typical atrial flutter episode of over 2 hours that has been documented in the history in the patient file and/or ECG * Signed informed consent form Exclusion Criteria: * Patient has recently undergone isthmus ablation * Acute coronary syndrome or myocardial infarction within the last 3 months * Acute reversible causes for atrial flutter (e.g. acute myocarditis) * Severe cardiac valvular defects * Tricuspid valve replacement * Atrial septum defect * Cardiovascular surgery scheduled within the next 6 months * Unstable medication in the last 7 days before study inclusion * New York Heart Association (NYHA) class IV * Women who are breastfeeding * Pregnancy * Abuse of drugs or alcohol * Patient is unable to participate in follow-up examinations * The patient has only partial legal competence * Participation in another clinical study * The ablation procedure presents an above average risk to the patient as compared to the normal patient group (must be noted by the physician on the appropriate form). * Right atrial thrombus Late Exclusion Criteria: * Patient included by accident * Premature termination of the ablation procedure * Atrial flutter not dependent on the posterior isthmus * No conduction at the posterior isthmus before ablation