When comparing all three PDA grades of preterm infants with available NT-proBNP of the first week of life (no PDA: n = 17, nhsPDA: n = 36 and hsPDA: n = 8), NT-proBNP serum levels appeared to increase with hemodynamic relevance of PDA in the first week of life, but differences in NT-proBNP levels did not reach statistical significance (Fig. 2 ).
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Diseases associated with prematurity in correlation with N-terminal pro-brain natriuretic peptide levels during the early postnatal life.
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