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