Abstract
Both B-type natriuretic peptide (BNP) and N-terminal pro-BNP (NT-proBNP) are useful biomarkers for the assessment of congestive heart failure (CHF) in adults. The purpose of this study was to determine whether BNP and NT-proBNP levels could be used to stratify the severity of CHF in children. The study comprised 181 children with CHF and 232 healthy children aged from 4 months to 14 years who were categorized into CHF grades I, II, III and IV according to the modified Ross scoring system. The plasma BNP and serum NT-proBNP levels were significantly correlated with increasing CHF grades. The NT-proBNP levels were significantly different among the 4 CHF grades. However, only 2 significant differences were observed in the BNP levels between each CHF grade. NT-proBNP testing with cut-off points of >438 pg/ml (> or =grade II), >1,678 pg/ml (> or =grade III) and >7,734 pg/ml (grade IV) in the patients below 3 years of age, and >295 pg/ml (> or =grade II), >1,545 pg/ml (> or =grade III) and >3,617 pg/ml (grade IV) in those above 3 years of age was determined to be highly sensitive and specific by receiver operating characteristic analysis. The blood levels of BNP and NT-proBNP therefore reflect the severity of CHF in children. In particular, NT-proBNP is a useful biomarker for evaluating CHF in children.
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