DOI: https://doi.org/10.22141/2224-0586.2.97.2019.161650

NT-proBNP level as a predictor of atrial fibrillation in patients with acute coronary syndrome

V.Y. Tseluyko, F. Ben Salem, O.E. Matuzok

Abstract


Background. Atrial fibrillation (AF) burdens myocardial infarction in 15.5 % of cases and is associated with 40–50 % mortality increase. The refore, the search for markers of AF risk in patients with acute coronary syndrome (ACS) is a valid task. The aim of present study was to evaluate the predictive value of N-terminal pro B-type natriuretic peptide (NT-proBNP) level regarding the risk of AF in patients with ACS. Materials and methods. We examined 125 patients with ACS. Subgroup 1a consisted of 41 patients with AF newly diagnosed during hospitalization for ACS. Subgroup 1b included 24 patients with history of AF. Patients without AF were included in group 2 (n = 60). Blood samples to determine NT-proBNP level using immunofluorescence assay were taken at admission. Results. Patients in group 2 were younger than those in subgroups 1a (р = 0.019) and 1b (р = 0.002). Persons in group 2 were more likely to be smokers than patients in group 1b (р = 0.029). Patients in group 2 had higher hemoglobin level than those in subgroup 1a (р = 0.014). Patients in subgroup 1b had higher glycemia upon admission compared to those in group 2 (р = 0.010). NT-proBNP level was highest in subgroup 1a: 1592.00 (439.20; 3281.00) pg/ml. In subgroup 1b and group 2, NT-proBNP levels were 1281.00 (844.45; 2012.50) and 226.50 (54.40; 822.00) pg/ml, accordingly (р1а-2 = 0.002; р1b-2 = 0.010). We have found the correlations between
NT-proBNP and the age of examined patients (r = 0.500; р = 0.00006), female sex (r = 0.286; р = 0.030), heart rate and glycemia at admission (r = 0.363; р = 0.005 and r = 0.482; р = 0.0001, accordingly), glomerular filtration rate (r = –0.459; р = 0.0003), hemoglobin level (r = –0.307; р = 0.019). In order to study the predictive value of NT-proBNP level regarding the risk of new-onset AF in ACS patients, we performed ROC analysis. Only patients from subgroup 1a and group 2 were included. At the cut-off point > 1774 pg/ml, the sensitivity was 48 %, the specificity — 95.2 %, area under ROC curve — 0.77 (95% confidence interval 0.64–0.91). Conclusions. In our study, NT-proBNP level depended on clinical and anamnestic parameters. It was highest in patients who developed new-onset AF on the background of ACS. NT-proBNP level > 1774 pg/ml was associated with the risk of AF.


Keywords


acute coronary syndrome; atrial fibrillation; NT-proBNP

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