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Clinical characteristics of transient is chemic attacks in black patients

Department of Psychiatry and Neurology of the Tulane Medical School, and the Department of Neurology of the Charity Hospital of New Orleans, LA.

We analyzed the clinical, CT, and angiographic findings in 50 black patients with carotid transient is chemic 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 is chemic stroke within 4 months. Of these black TIA patients, 22 (44%) developed clinical cerebral infarction.

Address correspondence and reprint requests to Dr. Leon A. Weisberg, Department of Psychiatry and Neurology, Tulane University Medical School, 1430 Tulane Avenue. New Orleans, LA 70112.

Received December 21, 1990. Accepted for publication in final form March 4, 1991.

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