NPPB and hydrops fetalis: Furthermore, when individuals with HFrEF were stratified according to d-ROM and BNP values, the group with high d-ROMs (≥353 UCARR) and low BNP (≤108 pg/mL) showed a higher occurrence of HF-related events compared to the HFrEF group with low d-ROMs (≤353 UCARR) and low BNP (log-rank test, p < 0.01).