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Factors that Increase Risk of Recurrent Seizure
after first Seizure
 | Abnormal neurologic findings |
 | Structural brain lesion on imaging study |
 | Abnormal EEG
 | Presence of Spikes on EEG after first seizure: 50-90% chance of recurrent
seizure |
 | No paroxysmal discharge: 12 to 25% chance of recurrent seizure |
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 | Elderly |
 | First degree relative has epilepsy |
| van Donselaar et al reported in
1992: prospective study of adults following an isolated idiopathic seizure |
| EEG findings |
Chance of recurrent seizure |
| with epileptiform discharge |
64% |
| non epileptiform abnormality |
41% |
| normal EEG |
22% |
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