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

我们对18名重度智障儿童（男9名，女9名，平均年龄12.1±4.6岁）进行了为期3天的20:00 - 8:00心率变异性研究，以评估睡眠时自主神经活动。在需要口吸、鼻吸或气管吸的儿童中，LF/HF比值明显更高。本研究结果提示，重度智障儿童睡眠时，吸力压力可能引起交感神经过度活跃，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.