正常新生儿心率变异性研究

Heart rate variability in normal newborns

摘要:

目的探讨正常新生儿心率变异性（ＨＲＶ）的特点。方法应用ＣｏｍｐａｓＸＭＨｏｌｔｅｒ分析系统对３５例正常足月新生儿进行ＨＲＶ时域分析。结果新生儿出生后１～７ｄ与８～２８ｄＨＲＶ指标无差异（Ｐ＞０．０５）。２４ｈ正常ＲＲ间期标准差（ＳＤＮＮ）、心率变异性指数（ＨＲＶＩ）与２４ｈ平均心率（ＡＨＲ）、最慢心率（ＭｉＨＲ）呈中度负相关（ｒ值分别为－０．４４，－０．４３，－０．５１，－０．５６，Ｐ＜０．０５）。结论ＨＲＶ是反映新生儿心脏自主神经功能较稳定的指标，结果可供新生儿ＨＲＶ研究参考。

Abstract:

Objective To study characteristics of heart rate variability (HRV) in the normal newborns. Methods Compas XM Holter system was used to analyze the time domain of HRV in 35 normal newborns. Results There was no difference in the parameters of HRV and heart rate indexes of newborns in the early period (1～7 d) and later period (8～28 d). There was moderate negative correlation between the standard deviation of all normal RR (SDNN) and the heart rate varibility index (HRVI) and average heart rate and minimum heart rate ( r :-0.44,-0.43,-0.51,-0.56, respectively P<0.05).Conclusions HRV parameters are stable indexes that reflect the function of the cardiac autonomic nervous system. The results may be referred to in the study of newborns' HRV.