CHRONOBIOLOGICAL ANALYSIS OF BLOOD PRESSURE IN A PATIENT WITH ATRIAL FIBRILLATION AT THE DEVELOPMENT OF HEART FAILURE AND ITS THERAPEUTIC AND SURGICAL TREATMENT Article Chibisov S., Katinas G., Brodskaya I., Ertman A., Gromyko G., Konradi A., Mamontov O., Merkuryeva A., Polunicheva E., Shlyakhto E., Soboleva A., Yashin S., Bhavdip B. Cardiology Research and Practice. Hindawi Limited. Vol. 1. 2013.