Metformin as an Adjunctive Therapy to Catheter Ablation in Atrial Fibrillation

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This clinical trial is being done to determine if metformin, a drug which is normally used in diabetes, can reduce atrial fibrillation in patients who are having an ablation for atrial fibrillation (AF). Atrial fibrillation is an abnormal heart rhythm which research has shown is related in part to obesity and diabetes. It is anticipated that the participants treated in the metformin arm will have greater freedom from recurrent atrial arrhythmias after ablation. Eligible participants enrolled in the trial will be assigned to one of the treatment arms (no treatment or metformin) and have follow-up visits up to approximately 1 year after the ablation. Additionally, all patients will also receive education on lifestyle changes and exercise which are standard of care.