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We analyzed the clinical,CT,and angiographic findings in 50 black patients with carotid transient ischemic attacks(TIAs).Thirty-two percent had TIAs lasting less than 1 hour,26%had TIAs lasting 1 to 6 hours,and 42%had TIAs lasting 6 to 24 hours.Fifty-two percent of TIA patients had CT evidence of cerebral infarction despite complete clinical recovery.CT was abnormal in two of 16(13%)patients with TIAs lasting less than 1 hour;however,CT was abnormal in 24 of 34(70%)patients with TIAs lasting longer than 1 hour. Angiographic findings of extracranial carotid disease appropriate to TIA symptoms were present in 12(24%)patients.Two patients in whom the TIA episode lasted less than 1 hour later had clinical cerebral infarction, whereas 20 patients with longer-duration TIAs developed ischemic stroke within 4 months.Of these black TIA patients,22(44%)developed clinical cerebral infarction. |
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blacks
carotid angiogram
carotid artery disease
CAT scan
CAT scan,abnormal
cerebrovascular accident
cerebrovascular accident,prognosis in
cerebrovascular accident,racial differences
cerebrovascular disease,risk factors in
transient ischemic attack
transient ischemic attack,natural history of
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