Assessment of autonomic nerve activity during sleep in severely retarded children to identify factors of sudden death.

对18例重度智力低下儿童(男9例，女9例，平均年龄12.1±4.6岁)进行了为期3天的20：00~8：00的心率变异性研究，以评估睡眠中自主神经活动的变化。在需要进行口腔、鼻腔或气管吸引术的儿童中，LF/HF比率显著较高。这一结果提示，吸引性应激可能导致严重智力低下儿童睡眠期间交感神经过度活动，影响心脏自主神经活动。

We studied the heart rate variability from 20:00 to 8:00 for three days in eighteen severely retarded children (9 boys and 9 girls: mean age 12.1±4.6 years old) to assess the autonomic nerve activity during sleep. LF/HF ratio was significantly higher in the children who required an oral, nasal or trachea suction. This result suggests the possibility that stress of suction causes sympathetic hyperactivity and affects the cardiac autonomic nervous activity during sleep in severely retarded children.