The use of BNP levels in stratifying HF patients is supported by three prospective studies, which collectively demonstrate that BNP levels correlate with EF,18 and that the prognostic value of BNP is equal or even higher than that of EF.19, 20 However, to the best of our knowledge, the clinical outcomes of HF patients stratified using EF or BNP levels have not been studied in a real‐world setting. Here, NPPB is linked to hydrops fetalis.