IL1B and hydrops fetalis: The mRNA relative expressions of IL-1β of HF zebrafish in the SYDC-H treatment group and digoxin treatment group were significantly decreased compared with those of HF zebrafish in the model control group (3.38 ± 0.32 versus 70,859.65 ± 6,903.64, p < 0.001; 1.49 ± 0.18 versus 70,859.65 ± 6,903.64, p < 0.001).