A Study on the Incidence and Patterns of Early and Late Seizures after Head Injury

ABSTRACT

Post-traumatic seizure is a known consequence of head trauma and a major public problem. But the surveillance study of this problem in our country is very rate. The purpose of the current study was to determine the incidence, clinical patterns and the outcome of the post-traumatic seizure in our institute. A retrospective review of management in 5053 patients with head injury was performed in our department between 1983 and 1992. In our series, the frequency of post-traumatic epilepsy was 254 patients, giving 1 5.0% incidence rate(early seizure occurred in 2.2% and late seizure occurred in 2.8% of patients). Of these, the records of 203 patients who received follow-up care for at least 2 years was reviewed. The first early epileptic attack occurred within 24 hours of injury in one third of the cases(33.3%), and the first late epileptic attack occurred within 1 year was about two thirds of the cases(64.6%). On CT scan findings, the early epilepsy had a higher incidence in scans that showed diffuse brain swelli ng and the late epilepsy had a higher incidence in subdural and intracerebral hematoma. 57.5% of early seizure were focal type, and 55.2% of late seizure were generalized convulsive seizure. The outcome of severe head injury patients with early seizure was better than that of late seizure group. The severity of head injury was related to the occurrence of late post-traumatic seizure.Development of new antiepileptic drugs, increasing knowledge of preventing post-traumatic sequelae and demand for surgical treatments have allowed the reduction of the incidence of the post-traumatic seizures. But further survey or study is recommanded in order to achieve more improvement in the management of post-traumatic seizures.