As shown in Fig. 2B, the levels of Kv4.3α, KvLQT1 and L-Caα1c were significantly decreased to 0.41±0.21, 0.23±0.11 and 0.29±0.13, respectively, in the HF groups, when the levels in the normal control group were artificially set as 1. The gene discussed is KCNQ1; the disease is hydrops fetalis.