The clinical study of the collateral circulation about internal carotid artery different segment occlusion with acute clinical symptoms

Objective To investigate the characterization of the collateral circulation and clinical and imaging data after internal carotid artery different segment occlusion.Methods All the 48 patients were with internal carotid artery occlusion by digital subtraction angiography diagnosing.28 patients showed internal carotid artery cervical segment occlusion and the other 20 patients,internal carotid artery cerebral segment occlusion.Collateral circulation and clinical and imaging of the two groups was compared and their function with National Institutes of Health Stroke Scale seore(NIHSSS) and the infarction size(cm~2) was estimated by(A·B·C)/2.Results In the internal carotid artery cervical segment occlusion groups,the presence rate of anterior communicating artery (ACoA),posterior communicating artery(PCoA),ophthalmic artery(OphA),which had 2 collateral pathways were higher than that of internal carotid artery cerebral segment occlusion group significantly (P0.05).The presence rate of loptomeningeal anastomoses(LMA) weren't significantly different between the two group(P0.05).In the internal carotid artery cervical segment occlusion groups,the patients whose NIHSSS≦8 on the 7th day were more and the infarction size was smaller than those in internal carotid artery cerebral segment occlusion (P0.05). Conclusion It indicates that the collateral circulation is different when the internal carotid artery different segment occlusion occured.The collateral pathways decide the infarction size and the integrative diagnosis.