Is ablation is better than medical treatment of atrial fibrilation knowing that im controlled on multaq?

Yes and No: Some will do better with ablation. Not 100% cure .In best of hands 70%.You still have to take medicines.

Both are effective: Catheter ablation for atrial fibrillation is reserved for the management of patients who have breakthrough atrial fibrillation spells despite treatment with arrhythmia meds like multaq. Atrial fibrillation is a disease of aging, and it is not unusual for patients who are controlled on medications for months or years to eventually require an ablation procedure.