NPPB and hydrops fetalis: Strong prognostic markers of HF, such as NTproBNP levels, MVO2 and one-year death rate, did not differ between groups (2309 pg/mL vs. 2462 pg/mL, p = 0.25), (14.7 mL/kg*min vs. 14.5 mL/kg*min, p = 0.77), (14.5% vs. 12.2%, p = 0.50).