NPPB and hydrops fetalis: The inclusion of NT-proBNP to the GWTG-HF risk score resulted in an improvement of the predictive power for mortality [AUC 0.788 (0.701–0.876) vs AUC 0.799 (0.709–0.888)], and for the combined endpoint HHF or mortality [AUC 0.700 (0.607–0.794) vs AUC 0.708 (0.616–0.800)].