Abstract
PurposeTo assess long-term incidence and predictors of post-stroke epilepsy (PSE) and to evaluate the antiepileptic drug (AED) treatment in a well characterized cohort of middle-aged patients. MethodsThe study is based on the Sahlgrenska Study on Ischemic stroke, and included 1066 adult patients with first-ever or recurrent acute ischemic stroke (AIS) before the age of 70. Early seizures (ES) were defined as seizures within one week and PSE as unprovoked seizures occurring more than one week from index stroke. Cardiovascular risk factors, subtype of AIS, and stroke severity were determined at baseline. ES, PSE, treatment with AEDs, recurrent stroke and mortality were assessed through national registers and medical records. Cox regression models were used for identifying predictors of PSE. ResultsTwenty-six patients (2.4 %) developed ES. After a median follow-up of 8.0 (IQR 4.1–10.9) years, 84 (7.9 %) had PSE, and 160 (15.0 %) had experienced a non-fatal recurrent stroke. Stroke location (total anterior and partial anterior circulation infarct, both P < 0.001), ES (P < 0.001), stroke recurrence (P < 0.001), artery dissection (P < 0.002), and previous coronary heart disease (P < 0.006) were independent predictors of PSE. Only 10 (11.9 %) had the first seizure more than four years after index stroke. In 24 (30 %) PSE patients, seizure control was not achieved. ConclusionsIn addition to well-known risk factors for PSE development, our data also identified stroke recurrence, artery dissection and established coronary disease. Seizure control was less common than expected and in a significant proportion of patients AEDs had not been adjusted despite continuing seizures.
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