NPPB and hydrops fetalis: Specifically, a NTproBNP of 330 pmol/L had a significant rise in HF hospitalization risk of 16% (HR 1.16, 95% CI 1.01–1.12), NTproBNP of 500 pmol/L had a HF hospitalization risk of 51% (HR 1.51, 95% CI 1.09–1.31) and NTproBNP of 1000 pmol/L had a 2.5 fold increase in the risk of HF hospitalization (HR 2.51, 95% CI 1.17–1.90).