Atrioventricular Node Ablation in Patients With Atrial Fibrillation and Moderate Chronic Heart Failure

Inclusion Criteria: * Age of 18-75 years * CHF II-III NYHA * Persistent/permanent AF requiring AV node ablation * LVEF \< 45% * Signed informed consent * Able to complete all testing required by the clinical protocol Exclusion Criteria: * Myocardial infarction or stroke less than 3 months prior to randomization * Patients who require revascularization, radiofrequency ablation of pulmonary veins and substrate of AF * The congenital and acquired heart diseases, LV aneurysm, which requires a surgical correction * Active inflammatory and autoimmune diseases of a myocardium * The thyrotoxicosis * The diseases that limit life expectancy (cancer, tuberculosis, etc.) * Contraindications to anticoagulants administration at CHADS2\> 2 * Uncompliant patients