Study of Ablation Versus antiaRrhythmic Drugs in Persistent Atrial Fibrillation

"Atrial fibrillation ablation with radiofrequency, guided by 3D navigation map. Either 4mm or cooled tip-catheters will be used.~It will include, at least, pulmonary veins isolation; all other radiofrequency lines, including roof and mitral isthmus line, and complex fractioned electrograms ablation will be performed according to each Hospital protocol. Radiofrequency lines block will be tested."

Usual drug therapy for atrial fibrillation. In patients with structural heart disease, amiodarone is recommended, while flecainide plus diltiazem or beta-blockers are encouraged in patients without structural heart diseases.