Hyperperfusion syndrome after carotid endarterectomy: a transcranial Doppler evaluation.
Transcranial Doppler ultrasonography was used to evaluate 2 patients who developed hyperperfusion syndromes after carotid endarterectomy. During the initial postoperative period, each patient had symptoms that were associated with elevated flow velocities in the ipsilateral cerebral vasculature. In addition, vascular resistance of these vessels was found to be abnormally low, as reflected by the Gosling pulsatility index. As the patients' symptoms improved, flow velocities decreased to normal levels and pulsatilities were noted to increase proportionately.
Powers
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Department of Neurological Surgery, George Washington University Medical Center, Washington, District of Columbia.
Smith
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D001927:Brain Diseases / Q000175:diagnosis* / Q000209:etiology; D002339:Carotid Arteries / Q000601:surgery*; D004691:Endarterectomy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000175:diagnosis; D015427:Reperfusion Injury / Q000175:diagnosis*; D014463:Ultrasonography