Listen to Dr. deGuzman discuss the success rate of drug therapy with Atrial Fibrillation.
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Drug therapy is successful in controlling the rate of transmission to the ventricles, but overall it is not very effective. About 40% to 60% of patients who are on medical therapy for atrial fibrillation ultimately failed that therapy and required other forms of therapy, either electrical types of therapy with cardioversion, or pacemaker implantation, or a catheter ablation, or even surgical procedures to cure the atrial fibrillation. So, overall, it is not very effective.