ELANE and hydrops fetalis: The frequency domain analysis showed that ELA-2 KO mice presented an attenuatedHRV compared to C57BL/6 with regard to the parameters presented in absolutevalues: very low frequency (VLF) (8.3±1.4 vs 20.2±2.7 ms,P=0.001), LF (7.5±1.4 vs 14.6±0.8 ms, P=0.003), and HF (3.3±0.8vs 8.6±0.8 ms, P=0.0003).