Definition
Evidence for occlusion or severe stenosis (more than 90%) of the
unilateral or bilateral carotid artery as detected by contrast-enhanced
CT and carotid duplex scan was defined as cerebral malperfusion. [6]
Clinical deficits were associated with preoperative symptomatic motor or
sensory deficits, including transient neurological deficit, syncope,
stroke, coma, altered consciousness, and hemiplegia.