Study of intracranial and extracranial arterial stenosis in patients with transient ischemic attack

Objective To investigate the characterisitics of intracranial and extracranial arterial stenosis in patients with transient ischemic attack.Methods 178 patients with transient ischemic attack were detected by DSA in order to analyze the distribution and the occurrence of intra-extracranial vascular. Results The 178 cases of transient ischemic attack,the rate of intra-extracranial vascular stenosis was( 69. 66%)( 124 cases). 40. 32%( 50 cases) was in anterior circulation and 35.48%( 44 cases) was in the posterior circulation and 24.19%( 30 cases) was in the anterior-posterior circulation. 23.39%( 29 cases) was of intracranial stenosis,58. 06%( 72 cases) was of extracranial stenosis and 18.55%( 23 cases) was both. As for incidence of single or dual stenosis among 237 vessels with arteriostenosis,single stenosis amounted to 58cases and dual to 66 cases. Extracranial stenosis occurred most in extracranial part of internal carotid artery. Intracranial stenosis more occurred in intracranial vertebral artery.Conclusion DSA can be accurate evaluation the distribution and degree of cranial vessels stenosis. So as to provide basement for the clinical treatment.