Clinical study on new seizure types in epilepsy patients / 中华神经科杂志

ABSTRACT

Objective To study the percentage and cause of new seizure types in epilepsy patients and attempt to evaluate the value of new seizure types.Methods All 1074 eapilepsy patients were envolled in the retrospectively study.The types of seizure were diagnosed according to International League Against Epilepsy seizure classification and neuroimaging results of the patients.The Wilcoxon signed rank sum test was used to assess the difference of age at first seizure and mean duration of epilepsy patients with and without new seizure types.The chi-square test was used to compare the abnormal proportion of EEG and neuroimaging results of epilepsy patients.Results Two hundred and thirty-one(21.5%)of 1074 epilepsy patients experienced new seizure type.Five hundred and eighty-four patients had partial seizure with 132 (22.6%)experiencing new types of seizure while 490 patients had generalized seizure with 99(20.2%)experiencing new types of seizure.Five hundred and seventy-six(53.6%)had abnormal EEG and 237 (22.1%)had abnormal neuroimaging in 1074 epilepsy patients.A hundred and twenty-three(52.3%)of 231 patients with new seizure types had abnormal EEG,and 75(32.5%)of them had abnormal neuroimaging. The possible causes for the new types of seizure could be found in 41 patients.There were no significant difference in the age of the first onset between the patients with and without the new types of seizure while there was significant difference in the average course of disease between them(χ~2=18.511-23.836.P＜0.05).There were significant differences in the rates of abnormal results of examination of nervous system and imaging outcomes.Conclusions There may be different causes of new seizure types.The study of new seizure types is helpful in diagnosis,treatment and prevention of epilepsy.