mortality was significantly high in cases with the following clinical features : ( 1 ) epilepsy with onset before the first birthday ( mortality being 25.5 % ) , ( 2 ) symptomatic epilepsy in etiology ( 17.2 % ) , ( 3 ) infantile spasms ( 40.7 % ) , tonic epilepsy ( 33.3 % ) or myoclonic epilepsy ( 33.3 % ) as compared with grand mal ( 5.9 % ) in seizure type and ( 4 ) developmental retardation at the first visit ( 25.5 % ) .
C0014544
epilepsy
C0014550
myoclonic