I DEFINITION. >Acute vascular origin )24hrs >Clinical dysfunctional syndrome II CLASSIFICATION >Transient ischemia >Cerebral thrombosis >Cerebral embolism >Cerebral hemorrage >Lacunar infarction >subarachnoid hemorrhagestroke Ⅰ DEFINITION: ØAcute vascular origin Ø24hrs ØClinical dysfunctional syndrome Ⅱ CLASSIFICATION: ØTransient ischemia ØCerebral thrombosis ØCerebral embolism ØCerebral hemarrage ØLacunar infarction Øsubarachnoid hemorrhage