Short Term Anti-aRrhythmic Therapy for Post-Operative AF in Cardiac Surgery Patients Pilot Trial

This pilot study looks at how long patients should take anti-arrhythmic medication (amiodarone) after developing a new irregular heartbeat called atrial fibrillation following cardiac surgery. Atrial fibrillation is common after heart surgery and usually resolves on its own, but the ideal duration of medication treatment is uncertain. **You may be eligible if...** - You are 18 or older - You recently had cardiac surgery (bypass, valve, or aorta surgery) within the past 14 days - You developed a new episode of atrial fibrillation or flutter after surgery, confirmed by ECG - You are expected to be discharged from the hospital within 48 hours of entering the study **You may NOT be eligible if...** - You had atrial fibrillation before surgery - You are pregnant or breastfeeding - You have severe thyroid, liver, or lung disease - You cannot safely take amiodarone due to a serious reaction or medical contraindication Talk to your doctor to see if this trial is right for you.