The Relationship between transient ischemic attack (TIA) and cerebral arterial stenosis

Objective To study the relationship between TIA and the incidence of intracranial and extracranial artery stenosis,the degree of stenosis,distribution characteristics as well as collateral circulation.Methods 107 cases were examined with digital subtraction angiography(DSA).To clear existence of the cerebral vascular stenosis,the distribution of stenosis,and responsibility artery stenosis.Results 93 patients had cerebral arterial stenosis and occlusion in total 156 places.The intracranial lesion was most seen in total 46 places(29.5%) in the middle cerebral artery,the extracranial lesion was most seen at the opening of internal carotid artery in total 22 places(14.1%).The incidence of collateral circulation in severe stenosis and occlusion group were significantly higher than that in mild and moderate group.Conclusion Intracranial and extracranial arterial stenosis are the important pathogenetic causes for TIA.Moreover,for TIA patients,the intracranial arterial stenosis is more important than the extracranial stenosis.