NPPB and hydrops fetalis: In other cases, they showed that BNP > 609 ng/L (equivalent to NTproBNP 5,019 ng/L) was associated with severe adverse events, BNP > 419 ng/L (equivalent to NTproBNP 3,403 ng/L) was associated with HF and BNP > 783 ng/L (equivalent to NTproBNP 6,499 ng/L) with pump thrombosis.