Variability of the level of the N-terminal fragment of brain natriuretic propeptide in plasma in hypertensive patients with/and without chronic coronary disease

Annotation. The article presents the results of studying the variability of the level of the N-terminal fragment of brain natriuretic propeptide (NT-proBNP) in plasma in patients with hypertension with/and without chronic coronary disease. An open observational one-point randomized comparative study included 118 patients with stage II hypertension with/and without chronic coronary disease (stable angina pectoris I-III functional class). An additional criterion for inclusion in the main group was the presence of atrial fibrillation. All patients, in addition to general clinical examination, additionally determined the levels of NT-proBNP in the blood plasma. Statistical processing of the obtained data was carried out using Microsoft Excel (2016) and Statistica 12.0 (Statsoft, USA). Absolute values were presented as the average value of the indicator (Mean) ± standard deviation for the sample (SD, standard deviation). Comparison of mean values in groups was performed using one-way ANOVA & LSD test. The dependence of the NT-proBNP level on the duration of the hypertensive history, the value of the functional classes of angina pectoris of chronic heart failure was proven. At the same time, it was demonstrated the lack of interdependence of the level of this biomarker with the clinical variant of atrial fibrillation and its characteristics, such as the duration of the history, ENRA class and frequency of attacks. The fact of a decrease in the level of NT-proBNP in the plasma in the case of alimentary-constitutional obesity and an increase in the body mass index was confirmed. In addition, an increase in the level of this biomarker was observed in the case of presence of hypertrophy of the left ventricle according to the ECG data, as well as in the case of a decrease in the value of the glomerular filtration rate, calculated according to the CKD-EPI formula.