Interestingly, Bergmark et al. evaluated the relevance of elevated FGF23 levels after acute coronary syndrome (ACS) [86] and showed that FGF23 provides prognostic information that is superior to already establish predictors and biomarkers, such as natriuretic peptide, eGFR, or highly sensitive troponin I. Furthermore, they demonstrated that higher FGF23 levels are associated with undesirable CV outcomes such as CV death and HF hospitalization. Here, FGF23 is linked to hydrops fetalis.