Late epileptic seizures after cerebral infarction.
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OBJECTIVE
To determine the profile of late epileptic seizures following cerebral infarcts and the predictive clinical and radiological factors associated with their development.
METHODS
We compared 86 patients who developed late seizures after cerebral infarction with 285 similar patients who did not develop seizures for at least 1 year after their stroke. Patients who had seizures only at the onset of the stroke were excluded. Odds' ratios were used for statistical analysis.
RESULTS
Simple partial, and mainly motor seizures, with or without secondary generalization, accounted for 80% of the classifiable seizures but it was not possible to determine the seizure type in half of the cases. Factors that appeared to be predictive of seizure development were the presence of large cortical infarcts and the presence of apparently preserved cerebral tissue within the infarcted area. Seizures were rare in patients with lacunar infarction but the presence of associated leukoaraiosis increased the risk. The risk was also increased in patients with other medical problems known to lower seizure threshold, such as renal failure.
