بررسی یافته های سونوگرافی داپلر عروق کاروتید اکستراکرانیال بیماران مبتلا به سکته مغزی (Anterior circulation) بر اساس محدوده گرفتاری در سی تی اسکن

Background and purpose : Ârterial embolism is one of the most prevalent cause of transient ischemic attack (TÏÂ) and other types of brain ischemias and about 5o% of TÏÂ patiens have vascular stenosis. Therefore the presence of mild atherosclerotic plaques in carotid arteries, as a source of embdlism in causing TÏÂ and other brain strokes are of a great importance. Ïn present study the stroke patients were survaied specially for the size of infarct region by carotid arteries Doppler sonography. The relationship between the size of infarct region and degree of stenosis and tye of carotid arteries plaque were analysed. Materials and Methods : This cross sectional study, was conducted on 100 patients with cerebral infarction in the region of anterior circulation referred to radiology department of Sina hospital. Patients selection was based on the date of admission and after Ç.T scanning, extracranial carotid arteries were survaied by Doppler sonography (Âloka-SSD-1700). Registration of results of this study was done in the year 2000. Results : Plaques were seen in ipsilateral carotid artery in 49% of patients. Proximal internal carotid artery was the most common site of involvement (34%) and carolid bifurcation and distal common carolid artery were involved consequently. Frequency of stenosis, specially the compelete sterosis, increased proportionately with the size of infarct area. The occlusion with small, medium and large sized infarction were zero, 16 and 33.3 percent respectively. Çonclusion : Frequency of stenosis, specially ipsilateral carotid stensis was strongly associated with large than small infarct (25% VS 3.3% p<0.05).