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最近一些报道指出以前的观点“当一支动脉闭塞后此动脉远端所有的短暂性缺血发作(transient ischemic attack,TIA)均应停止”常是错误的。经研究发现颈内动脉(ICA)闭塞之后一过性黑朦或半球性TIA仍可发生,据统计ICA闭塞后迁延性TIA占5～53%。很多资料强调颈外动脉(ECA)对此种现象起作用,迁延性TIA常认为系微栓塞与ECA之溃疡扭结或ECA之动脉粥样硬化斑有关,栓子经ECA侧副通路达视网膜及大脑,由于栓子很小,可以通过ECA-ICA之吻合网,故TIA常短暂而不表现恒久性卒中,ICA闭塞后迁延性TIA很少由于血
Recent reports point out the previous observation that “it is often wrong to suspend all transient ischemic attacks (TIA) distal to this artery after an artery occlusion”. After the study found that occlusion of the internal carotid artery (ICA) after a transient dark or hemispheric TIA can still occur, according to the statistics of ICA occlusion after TIA accounts for 5 to 53%. A lot of data emphasize the role of the external carotid artery (ECA) on this phenomenon, persistent TIA is often considered Department of micro-embolism and ECA ulcer kinks or ECA atherosclerotic plaque related to the ECA side of the embolus by the sub-passage of the retina and brain , Due to the small emboli, ECA-ICA through the anastomosis of the network, so often short-term TIA without permanent stroke, ICA occlusion of persistent TIA rarely due to blood