Hospital Register of Decompensated Heart Failure With Preserved Ejection Fraction

Transthoracic echocardiography at rest: with determination of epicardial fat tissue thickness, intensity of mitral regurgitation.

Bioelectrical impedance analysis research

Enzyme immunoassay of heat shock proteins in blood serum

Measuring of routine biochemical parameters (glucose, total protein, creatinine, urea, uric acid, total bilirubin, direct bilirubin, total cholesterol, triglycerides, low and high density lipoprotein cholesterol, Lactate dehydrogenase, creatine phosphokinase, aspartate aminotransferase, alanine aminotransferase, sodium, potassium and special (C-reactive protein, N-terminal pro b-type natriuretic peptide)