acute ischemic stroke

a·cute is·che·mic stroke

(AIS) (ă-kyūt' is-kē'mik strōk) Circulatory cerebral occlusion that produces varying degrees of neurologic deficits. Ischemic strokes account for 85% of all attacks; most are caused by thrombus formation or embolus due to atherosclerosis. Cardiogenic embolic stroke, usually caused by atrial fibrillation, is the second major cause of acute ischemic stroke.
Synonym(s): brain attack, cerebral vascular attack.