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高热惊厥是指年龄在5个月～6岁小儿高热时发生的任何颅外感染所致的惊厥。发生惊厥时体温一般在38～39C以上,常见于病毒性上感的早期。抽搐发生在开始发热后的较短时间内,多在体温骤然上升时,突然出现短暂的全身抽搐,伴意识丧失。多数患儿每次发病过程中只有一次发作,持续5～10分钟。惊厥前无异常,止惊后患识恢复快。热退1～2周后脑电图检查正常。惊厥的发生并不是来自感染本身,而是感染所致的高热。
Convulsive febrile seizures are any convulsions caused by extracranial infections that occur when a child is hyperthermic from 5 months to 6 years of age. Occurrence of convulsions when body temperature is generally above 38 ~ 39C, common in early viral sense. Twitch occurred in a short time after starting fever, and more in the sudden rise in body temperature, the sudden emergence of transient systemic convulsions, with loss of consciousness. The majority of children with each episode of only one attack, lasted 5 to 10 minutes. Pre-convulsions without exception, only after the start of recovery faster recovery. Heat back 1 to 2 weeks after normal EEG. Convulsions do not come from the infection itself, but from the high fever caused by the infection.