Analysis of computed tomography angiography in frequent transient ischemic attack related to internal carotid artery

Objective To investigate the characteristic and rate of vascular stenosis of frequent transient ischemic attack related to internal carotid artery.Methods Results of computed tomography angiography(CTA) of 43 patients with frequent transient ischemic attack related to internal carotid artery were retrospectively analyzed and compared with patients with infrequent transient ischemic attack.Results Stenosis of intracranial artery,extracranial artery,both intracranial and extracranial artery existed in 15(35%),10(23%),4(9%) patients,respectively.The rate of stenosis was 67%.Patients with mild stenosis,moderate stenosis,severe stenosis were 7(16%),9(21%),13(30%),respectively.The stenosis rate of internal carotid artery system of 33 patients with infrequent transient ischemic attack was 79%.There was no significant difference between these two groups(P=0.273).Conclusion Stenosis existed in 67% patients with frequent transient ischemic attack related to internal carotid artery,but there was no statistical difference compared with infrequent transient ischemic attack.