Convulsions are systemic or local group sudden involuntary contraction of skeletal muscle, often accompanied with disturbance of consciousness, this disorder of nervous system function temporarily, abnormal discharge of neurons, mostly due to excessive amounts of central nervous system arousal caused, can also be due to the reduction of peripheral polyneuropathy muscle stimulation threshold, such as caused by intracellular free calcium in the blood is too low. 10~15 times the incidence of seizures in children are adults, and febrile convulsion and convulsion in children caused by one of the most important reasons, with statistics in children under 5 years old, 2%~3% have febrile convulsion.
Recurrence of febrile convulsion and often, after the initial seizure, about 25%~40% (average 33%) there was a convulsion in children in the future a febrile disease recurrence. In febrile convulsion in children, one-third and second convulsions, which one-second the third attack. Total recurrent rate of 9% or more.
Therefore predict whether relapse, is very important to determine the prognosis of convulsion. Prediction of recurrence of major is based on the age of onset. Initial attack in less than one year old children with the highest relapse rate, approximately one-second cases will recur. If it is a complex febrile convulsion, who have a family history of epilepsy, recurrent opportunities. Relapse occur within 2 years after the first febrile convulsion.
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