The SOD levels of the HF zebrafish in the SYDC-H treatment group and the digoxin treatment group were significantly increased compared with those of HF zebrafish in the model control group (3.76 ± 0.05 U/mgprot versus 0.78 ± 0.16 U/mgprot, p < 0.01; 3.62 ± 0.25 U/mgprot versus 0.78 ± 0.16 U/mgprot, p < 0.01). The gene discussed is SOD1; the disease is hydrops fetalis.