BCL2 and hydrops fetalis: The relative mRNA expressions of Bcl-2 of HF zebrafish in the SYDC-H treatment group and digoxin treatment group were significantly changed compared with those of HF zebrafish in the model control group (18.79 ± 4.68 versus 4.92 ± 1.58; 20.56 ± 4.08 versus 4.92 ± 1.58, p < 0.01).