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短暂脑缺血发作(简称 TIA),是指脑局部血流一时性、反复性受阻或中断,每次发作引起的神经功能缺失症状,历时数秒钟、数小时,最多不超过24小时即完全恢复.TIA 确切发病率不明,在社会人群中调查,其一年内发病率:55～64岁为1‰,65～74岁2‰,75岁以上为3‰.也有人报告在75岁以上的老人中,发病率达31%,它占急性脑血管病住院总人数的1.3～4.7～7.6%.病因病机目前争论不一,多认为它是一个多病因的症候群,其中以主动脉—颅脑动脉粥样硬化为最重要,占病因的65%.其发病机理可分两类:1、微血栓学说:该学说的主要依据是:①在颈内动脉血栓病人的视网膜动脉中,曾发现有极微小的粒子在动脉中移动:②消除栓子来源;或给以
Transient ischemic attack (TIA), refers to the temporal brain blood flow, repeated obstruction or interruption, each episode of neurological deficit symptoms, which lasted a few seconds, a few hours, up to no more than 24 hours to fully recover The exact incidence of TIA is unknown and has been investigated in the community of people, with incidence rates of 1 ‰ in 55-64 years, 2 ‰ in 65-74 years and 3 ‰ in 75 years old, as well as in people over the age of 75 , The incidence rate of 31%, which accounts for 1.3 ~ 4.7 ~ 7.6% of the total number of hospitalized patients with acute cerebrovascular disease.Etiological and pathogenesis is currently controversial, think it is a multi-cause syndrome, including aorta - brain Atherosclerosis is the most important, accounting for 65% of the cause of its pathogenesis can be divided into two categories: 1, the theory of micro-thrombosis: The doctrine is mainly based on: ① in patients with internal carotid artery thrombosis retinal artery, it has been found Very tiny particles move in the artery: ② eliminate the source of emboli or give