Relationship between Intracranial and Extracranial Artery Stenosis and Clinical Attack Characteristics in Patients with Transient Ischemic Attack

Objective To investigate the relationship between intracranial and extracranial artery stenosis and clinical attack characteristics in patients with transient ischemic attack(TIA).Method 112 TIA patients received digital substract angiography were admitted.The frequency,distribution,degree,and plaque of intracranial and extracranial artery stenosis were analysed,and the relations between frequency and duration of transient ischemic attack and stenosis degree were studied.Results 69.6%(78/112)of the patients were found with intracranial and extracranial artery stenosis,61.5%(48/78)of which involved in intracranial artery and the rest in extracranial artery.84.6%(66/78)of stenosis had plaque.Among all patients,those with stenosis degree≥70%accounted for 39.3%(44/112),with stenosis degree about 50%to 70%accounted for 7.1%(8/112),and with stenosis degree50%accounted for 23.2%(26/112).Total stenosis degree and the degree of moderate-severe stenosis in the frequentlyattack subgroup were higher than those in the non-frequently-attack subgroup(P0.05).Patients with moderate-severe stenosis who suffered shorter than 10min of TIA were more than those with mild stenosis(P0.05).Conclusion Intracranial and extracranial artery stenosis and stenosis with plague are the main reasons for TIA.The frequency and duration of TIA have correlation with artery stenosis.