Objective To analyze the characteristics of the clinical manifestations of Dravet syndrome(DS)children with SCN1 A gene mutations so as to help pediatricians to make right decisions to treat DS patients.Methods Twenty-nine DS patients(16 males and 13 females,mean age of 3.2 years old)were retrospectively studied.The clinical records,including SCN1 A gene test,psychomotor developmental assessmentsm,and electroencephalogram,were collected.Results SCN1 A gene mutation was detected in19 cases,including missense...