Method for treating or Preventing atrial fibrillation and / or atrial flutter which comprises administering to dronedarone and ranolazine or one of its salts； Pharmaceutical formulation comprising ranolazine and droneEdarona or a Salt thereof and a pharmaceutically acceptable Carrier.<；p>；Mé；todo para tratar o prevenir fibrilació；n auricular y/o aleteo auricular que comprende administrar dronedarona y ranolazina o una de sus sales； formulació；n farmacé；utica que comprende ranolazina y dronedarona o una sal de é；stas, y un portador farmacé；uticamente aceptable.<；/p>；
