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  • Title: Hemichorea due to hemodynamic ischemia associated with extracranial carotid artery stenosis. Report of two cases.
    Author: Morigaki R, Uno M, Suzue A, Nagahiro S.
    Journal: J Neurosurg; 2006 Jul; 105(1):142-7. PubMed ID: 16871890.
    Abstract:
    In this paper the authors describe two patients with recurrent hemiparesis and limb shaking that gradually progressed to hemichorea. Cerebral angiography confirmed severe unilateral internal carotid artery stenosis (95%) contralateral to the hemichorea. The cerebral blood flow, assessed using N-isopropyl-p-(iodine-123) iodoamphetamine single-photon emission computed tomography (SPECT), disclosed markedly decreased vascular reserves in both patients. After carotid endarterectomy was performed, the hemichorea gradually subsided and SPECT confirmed increased cerebral perfusion. The results in these cases indicate that surgical revascularization is effective for hemichorea due to cerebral ischemia with reduced vascular reserve.
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