FUNCTION CLASS OF CHRONIC HEART FAILURE AND EFFICIENCY OF THERAPY AMIODARONE AND ITS COMBINATION WITH BETA-ADRENOBLOCKERS PERMANENT FORM OF ATRIAL FIBRILLATION AT PATIENTS WITH ARTERIAL HYPERTENSION AND ISCHEMIC HEART DISEASE. (2015). The Journal of V. N. Karazin Kharkiv National University, Series "Medicine", 9, 63-66. https://periodicals.karazin.ua/medicine/article/view/7196