Acute symptomatic epileptic seizures and epilepsy after stroke

Acute symptomatic epileptic seizures occur within 7 days after the stroke onset. Acute symptomatic epileptic seizures occur in 6.3% of stroke cases: ischemic stroke — 4.2%, cerebral infarction with hemorrhagic transformation — 12.5%, intracerebral hemorrhage — 16.2%. Cumulative risk of subsequent unprovoked epileptic seizure after the first acute symptomatic seizure at follow-up for 10 years is 18.7 %. In acute symptomatic epileptic seizure secondary prevention with antiepileptic drugs usually is not indicated. If antiepileptic drug treatment is initiated after a single acute symptomatic seizure, it should be discontinued after the acute period of the disease. The 10-years risk of subsequent unprovoked epileptic seizures after the single unprovoked epileptic seizure in stroke patients is 71.5%. In this situation the epilepsy diagnosis is reasonable and antiepileptic drug treatment should be initiated. The incidence of epilepsy after acute ischemic or hemorrhagic stroke is identical — 10–12%. The choice of the group of antiepileptic drugs should be based on clinical guidelines for patients with focal forms of epilepsy. Pharmacokinetic interactions between antiepileptic drugs and oral anticoagulants, antiplatelet agents, antihypertensive drugs, and other xenobiotics should be minimized. Thus antiepileptic drugs that induce or inhibit microsomal liver enzymes should also be avoided.