Evaluation of extracranial carotid artery duplex ultrasound scanning parameters in cerebral ischemic or nonischemic patients without significant cervical carotid artery stenosis

Reduced flow velocity in the internal carotid artery independently of cardiac hemodynamics in patients with cerebral ischemia

“…This may suggest that the relationship between age or IMT and carotid flow velocity involves similar if not identical mechanisms, which is not surprising, because IMT increases with age. The finding of a decrease in carotid flow velocity with age is consistent with our preliminary report 6 and other reports, 11,12 although this has not been observed in younger patients. 13 As for IMT, its increase is an established marker of atherosclerosis, 14 in the carotid as in other territories.…”

“…5 The PSV threshold value believed to indicate cervical internal carotid artery (ICA) stenosis is usually greater than 100-120 cm/s, 1,2 but there is no consensus as for the threshold value and the interpretation of lower velocities. A recent study from our institute 6 found a significant reduction in both PSV and EDV in patients with cerebral ischemic symptoms. Nevertheless, intracranial abnormalities, such as intracranial arterial stenosis or scars from a major stroke, were not addressed in this study, although they are likely to affect intracranial hemodynamics and subsequently alter CA blood flow.…”

“…21,22 In spite of these limitations, our study yielded specific and original findings in patients with cerebral ischemic symptoms who appeared to have significantly lower flow velocities in the left and right cervical ICA, confirming the findings of our preliminary study performed in a different population. 6 Other authors reported a low CCA blood flow volume in patients with ischemic cerebrovascular attack. 23 Because the cardiac parameters were equivalent in patients with or without cerebral ischemic symptoms, our initial hypothesis that cardiac hemodynamics could partly explain or affect the observed decline in carotid flow velocities in patients with cerebral ischemic symptoms cannot be supported by our present findings.…”

The relationship between leukoaraiosis volume and parameters of carotid artery duplex ultrasonographic scanning in asymptomatic diabetic patients

“…With B-mode imaging data, the intima-media thickness (IMT) of both common CAs and the diameter of the common and cervical internal CAs are also measured. Details of ECADUS by our institute have been described previously [12,13]. The ECADUS examinations were performed using a Powervision 8000 scanner (Toshiba Medical Systems, Tokyo, Japan) by a single technician and confirmed by one of the authors (T.T.).…”

Angiosurgical prevention of ischemic stroke in patients with multifocal atherosclerosis

“…Даже если учесть, что потенциальный источник эмболии не всегда может являться истинной причиной инсульта, эмболия в настоящее время рассма-тривается в качестве ведущего патогенетического меха-низма инсульта. Наиболее частой локализацией атеро-склеротического поражения являются область бифурка-ции общей сонной артерии (ОСА) и проксимальный от-дел внутренней сонной артерии (ВСА) [5,10,21,22]. Ате-росклеротическая патология нередко бывает сочетанной, при этом атеросклеротический стеноз развивается как в каротидной, так и в вертебрально-базилярной сосудистой системе с одной или с двух сторон, или атеросклеротиче-ский стеноз выявляется одновременно в разных отделах ВСА -в экстрацеребральном (проксимальный отдел ВСА) и в интракраниальном (сифон и в средней мозговой артерии).…”