Inclusion Criteria:  Age equal to or older than 18 years infection with the SARS-CoV-2 in past medical history current hospitalization  Exclusion Criteria:  severe hypertension; unstable angina; acute pulmonary embolism; decompensated heart failure; recent myocardial infarction; unstable heart rhythm disturbances; acute myocarditis or pericarditis; active endocarditis; advanced atrioventricular block; diagnosis of cardiomyopathy (hypertrophic, dilated, restrictive, peripartum, arrhythmogenic) lysosomal storage disorders severe hyper- and hypothyroidism pregnancy and lactation chronic kidney disease (IV, V stadium according to NKF) and dialysis treatment documented neoplastic process the patient's inability to cooperate and/or provide informed consent to participate in a research alcohol and drug abuse active autoimmune disease treatment using immunosuppressants, cytostatic drugs, glucocorticosteroids, or antiretroviral drugs a history of bone marrow transplant or other organ transplant, treatment with blood products within the last 6 months active systemic infection HBV, HCV or HIV carrier or positive for HbS antigen or antibodies to HCV surgery or serious injury within the last month patients who did not express their informed consent to participate in the study