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患儿男、12岁,因睡眠中发生一过性意识丧失伴抽搐、小便失禁而行脑电图检查,结果为阴性,患儿姐姐也有同样情况。两周后,患儿睡眠中再发晕厥并再行脑电图检查。检查中行通气试验60秒时,出现短联律间期的室早(<200ms)、心电图短长短现象,并发生多形性室速。心电图可见长RR间期后J波幅度增高(图1)。复习前次脑电图检查高通气试验时,也有短联律间期的室早,但未诱发室速。本图为多通道脑电图和单导联心电图同步记录,患儿高通气1min后,短联律间期的室早诱发室速、室颤。而高通气试验前无室早,长RR间期后可见J波幅度增加(箭头指示)。
Children, aged 12, had a transient loss of consciousness associated with convulsions and urinary incontinence while undergoing electroencephalography (EEG). The result was negative and their sister had the same condition. Two weeks later, the child recurred with syncope during sleep and proceeded with EEG examination. Check the ventilation test 60 minutes, the short period of interventricular septal early (<200ms), ECG short and short phenomenon, and the occurrence of pleomorphic VT. Electrocardiogram can be seen after the RR interval J wave amplitude increased (Figure 1). Review of the previous EEG examination of hyperventilation test, there are short-term interventricular septal early, but did not induce VT. This picture shows the simultaneous recording of multi-channel EEG and single-lead electrocardiogram. In children with hyperventilation for 1 minute, ventricular tachycardia and ventricular fibrillation were induced in short-term inter-ventricular interventricular septum. However, there was no room early in the hyperventilation test, and an increase in J wave amplitude was observed after a long RR interval (arrow).