CYGB and hydrops fetalis: When analyzing laboratory test results of patients in different HF groups, it was observed that HFrEF patients had significantly higher blood concentrations of hemoglobin (HGB), C-reactive protein (CRP), creatinine, aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), gamma-glutamyl transferase (GGT), uric acid, and n-terminal pro-B-type natriuretic peptide (NT–ProBNP) compared to the HFpEF group.