Paraclinical characteristics: mean ejection fraction EF 27, 89 ± 5, 81%; average concentration of NT - proBNP 824, 13 [377, 30; 4138, 0] pmol / L; the mean troponin T concentration was 39, 81 [6, 80; 130, 0] ng / L; mean glomerular filtration rate 47, 16 ± 20, 39 ml / min, average blood lactate concentration 1, 80 ± 0, 71 mmol/l.