Study Of Image Lesion Patterns And Collateral Compensation To Cerebral Infarction Patients With The System Of Ipsilateral Internal Carotid Artery Stenosis Or Occlusion

Objectives: Analyzing image lesion patterns and collateral compensation to cerebral infarction patients with the system of ipsilateral internal carotid artery stenosis or occlusion.Methods: Retrospective studying of sixty-four acute ischemic stroke patients with stenotic or occlusive ICA or MCA certified by cerebral angiography ,who were divided into two groups: ICA disease group and MCA disease group. We studied the character of image lesion patterns(territory infarcts, subcortical infarcts, border zone infarcts, and several disseminated small infarcts) and analyzing the information about the circle of Willis and second collateral compensation.Results: There were 43 cases in ICA group, 21 cases in MCA group. In four infarct patterns, the incidence of border zone infarcts in ICA group was more often than MCA group(p=0.042), but the incidence of subcortical infarcts in MCA group was more often than in ICA group(p=0.046). There were 16 stenotic cases and 27 occlusive cases in ICA group, the occurrence rate of ophthalmic artery in occlusive group was more often than stenotic group. No obviously difference appeared about the four lession patterns in ICA subgroup. In ICA group, the incidence of collateral circulation was 83.7%, and the incidence of the circle of Willis mixed with the second collateral circulation was 62.8%, anterior communicating artery,25.6%, posterior communicating artery,25.6%, ophthalmic artery,41.9%, leptomeningeal artery ,41.9%.Conclusions: Territory infarcts were more seen in acute cerebral infarction patients with ICA stenosis or occlusion, and the main Compensatory approach for those patients was the circle of Willis mixed with the second collateral circulation. The incidence rate of ophthalmic artery was more in ICA occlusive group than ICA stenotic group. Subcortical infarcts were more seen MCA stenotic or occlusive patients.