SIMILARITIES AND DIFFERENCES IN ULTRASOUND OF EXTRACRANIAL BRACHIOCEPHALIC ATHEROSCLEROTIC LESIONS IN PATIENTS WITH ISCHEMIC ANTERIOR AND POSTERIOR CIRCULATION STROKE
One of the reasons for ischemic stroke (IS) in both anterior and posterior circulation is atherosclerosis. Aim. To establish similarities and differences in ultrasound of extracranial brachiocephalic atherosclerotic lesions in patients with ischemic anterior and posterior circulation stroke. Material and methods. The study involved 668 patients (men, 370; women, 298) with carotid territory IS aged 63±11 and 69±9 years, respectively, and 235 patients (men, 129; women, 106) with vertebrobasilar (VB) territory IS aged 59±12 and 63±10 years, respectively, who underwent duplex ultrasound. Results. Atherosclerotic plaques (ASP) in the internal carotid arteries (ICA) were diagnosed significantly more often (p<0,05) (right ICA (ICAr) - 44,0% of cases; left ICA (ICAl) - 48,4%) and the degree of stenosis of ICA mouths was significantly higher (p<0,05) (ICAr - 53±23%, ICAl - 54±24%) in carotid territory IS than in VB territory IS (ICAr - 34,0% of cases; average degree of stenosis - 47±18%; ICAl - 33,6%, average degree of stenosis - 46±18%. There were no significant differences in the prevalence of ASP in vertebral arteries and related stenosis in IS in both territories. Also, there were no significant intergroup differences in the prevalence of homogeneous anechoic or hypoechoic and heterogeneous with hypoechoic predominance ASPs in the ICA mouths: in carotid territory IS, such ASPs were detected in each ICA in 33,5% of cases; in VB territory IS, in 29,6% of cases. Conclusion. In patients with carotid and VB territory IS, risky ASPs were recorded with the same frequency, while the overall prevalence of ASPs and the stenosis degree of ICA mouths was significantly higher in carotid IS.