The Experimental Study on Power Spectrum Analysis of HRV in IUGR Rats
IUGR胎鼠HRV谱分析实验研究

The feasibility of diagnosing intrauterine growth retardation (IUGR) was investigated by evaluating the development and function of fetal autonomic nervous system (ANS).The animal model of IUGR was established by dietary restriction and drinking,the power spectrum of fetal rats' heart rate variability (HRV) was analyzed by autoregression (AR). The results showed that the total frequency (TF),low frequency (LF) and high frequency (HF) of power in the experimental group were all significantly higher than those in the control group,but the standardized HF of power in the experimental group became lower than those in the control group, the standardized LF of power in the experimental group remained significantly higher than those in the control group. It proved that the development and function of fetal ANS can be evaluated by power spectrum analysis,so power spectrum analysis can be used to diagnose IUGR.