TNF and hydrops fetalis: The mRNA relative expressions of TNF-α 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 (1.21 ± 0.22 versus 1,204.50 ± 46.78, p < 0.001; 1.68 ± 0.39 versus 1,204.50 ± 46.78, p < 0.01).