NPPB and hydrops fetalis: It is shown that natriuretic peptides are increased in HF; plasma B-type natriuretic peptide (BNP) and N-terminal propeptide of B-type natriuretic peptide (NTproBNP) levels have prognostic values for the diagnosis and prognosis of patients with suspected or established chronic heart failure (CHF).4-8 NT-proBNP has a long­er plasma half-life and higher plasma concentrations and so is of relevance for its use as a diagnostic tool.8,9 Although strong association is shown between HF and NT-proBNP, its clinical use is limited due to different reported values.10-14