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Of 438 first strokes,212(49.5%)were assigned at least one probable cause, 80(18.7%)had no probable cause but at least one possible cause and 136(31. 8)had no identified probable or possible cause.Of the 212 with at least one probable cause,the distribution of etiologies was cardiac embolism(31. 1%),hematologic and other(19.8%),small vessel(lacunar)disease(19.8%), nonatherosclerotic vasculopathy(11.3%),illicit drug use(9.4%),oral contraceptive use(5.2%),large artery atherosclerotic disease(3.8%)and migraine(1.4%).There were an additional 69 recurrent stroke patients.In this hospital-based registry within a region characterized by racial/ethic diversity,cardiac embolism,hematologic and other causes and lacunar stroke were the most common etiologies of cerebral infarction in young adults. Nearly a third of both first and recurrent strokes had no identified cause. |
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