Features of cardiovascular remodeling, the level of neurohumoral factors depending on the degree of chronic heart failure and kidney dysfunction

Abstract

Aim. To study the relationship between the level of the N-terminal prohormone of brain natriuretic peptide (NTproBNP) and aldosterone in serum, cardiovascular remodeling parameters with the degree of chronic heart failure (CHF) and kidney dysfunction (KD).Material and methods. Fifty two patients with coronary artery disease with CHF of I (19 patients), II (21) and III (12) functional classes (FC) were examined. All patients underwent echocardiography with assessment of systolic function and structural-geometric parameters of the left ventricle (LV), blood flow study at the level of the common carotid artery (CCA) with the determination of the thickness of the intim-media complex, velocity parameters of blood flow, resistance (RI) and pulsation (PI) indexes, estimated glomerular filtration rate (eGFR) by CKD-ЕРI method, the level of NTproBNP and aldosterone in serum. The patients were divided depending on the eGFR elvel: 30< eGFR ≤60 ml/min/1,73 m2 — 14 patients, eGFR >60 ml/min/1,73 m2 — 38 patients.Results. Patients with II FC CHF had the medium-high NTproBNP and aldosterone values. Subjects with FC III CHF had high levels of NTproBNP and aldosterone. A correlation relationship was found between the NTproBNP, aldosterone and ejection fraction (EF) levels (r=-0,70 and r=-0,72, respectively), between the NTproBNP, aldosterone and enddiastolic LV velocity (r=0,78 and r=0,70, respectively). There was a significant thickening of the carotid intima-media complex and a decrease in the blood flow velocity and an increase in vascular resistance with increasing CHF. We also noted a significant difference in the maximum end-diastolic velocity in patients with eGFR ≤60 ml/min/1,73 m2 compared with this indicator in patients with eGFR >60 ml/min/1,73 m2.Conclusion. In patients with CHF, a significant increase in NTproBNP and aldosterone levels is associated with FC of CHF, LV systolic dysfunction and KD. The interrelation of cardiovascular remodeling indicators with the degree of CHF and KD was revealed.