eISSN: 1896-9151
ISSN: 1734-1922
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abstract:
Clinical research

Is N-terminal pro-brain natriuretic peptide a reliable marker for body fluid status in children with chronic kidney disease?

Hulya Nalcacioglu
,
Ozan Ozkaya
,
Hasan C. Kafali
,
Demet Tekcan
,
Bahattin Avci
,
Kemal Baysal

Online publish date: 2019/06/03
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Introduction
Brain natriuretic peptides, released in response to left ventricular stress, have a strong prognostic value in dialysis patients. However, their role in detecting abnormalities of fluid status is under debate; the relationship between volume status and brain natriuretic peptide s (BNPs) differs among various studies. The aim of our study was to evaluate the clinical utility of N-terminal proBNP in the assessment of fluid status and cardiovascular risk in this setting.

Material and methods
The study included 65 children: 10 pre-dialysis, 13 hemodialysis, 12 peritoneal dialysis patients and 30 healthy controls. Volume status was determined by multifrequency bioimpedance and NT-proBNP, as well as echocardiography to estimate the left ventricle structure and function.

Results
The median log NT-proBNP values of hemodialysis and peritoneal dialysis patients were 3.66 (2.05–4.90) and 3.57 (2.51–4.13) pg/ml, respectively, and significantly higher compared with the control group (p < 0.001, p < 0.001). On simple correlation, NT-proBNP was correlated with markers of volume overload and cardiac dysfunction. On multivariate regression analysis, only left ventricle mass index ( = 0.402, p = 0.003) and left atrium diameter ( = 0.263, p = 0.018) were independently associated with NT-proBNP (adjusted R2 of the model: 0.707, p < 0.001).

Conclusions
Our research suggested that NT-proBNP, which was correlated with LV systolic and diastolic dysfunction and fluid overload as assessed by bioimpedance, can be used to evaluate cardiovascular states in a chronic kidney disease (CKD) population. From the early stages of CKD, periodic monitoring of NT-proBNP levels may be essential for early detection of patients with high risk of cardiovascular events, and for taking preventive intervention as soon as possible.

keywords:

chronic kidney disease, pediatrics, bioimpedance analysis, volume status, N-terminal pro-brain natriuretic peptide

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