IL1B and hydrops fetalis: Indeed, regardless of LVEF, HF patients with low sST2 (≥35.0 ng/ml) and also low IL-1β (≥49.1 pg/ml) had significantly lower risk of CV death, HF-related outcomes including readmission, than among patients with high sST2 (>35.0 ng/ml) and also high IL-1β (<49.1 pg/ml) levels [115].