The HF group expressed significant lower concentrations of NaV1.5 (0.62±0.23AU vs. 1.00±0.32AU, P=0.020), KCNE1 (0.74±0.24AU vs. 1.00±0.20AU, P=0.018), KCNE2 (0.62±0.14AU vs. 1.00±0.43AU, P=0.020), and ERG (0.48±0.19AU vs. 1.00±0.32AU, P=0.003) than the sham group. The gene discussed is KCNE2; the disease is hydrops fetalis.