Anecdotal reports have described a false-positive "jet effect" or velocity increase in the carotid artery contralateral to an artery with significant stenosis or occlusion when using duplex Doppler sonography. In this study, the frequency, significance, and possible reasons for this finding were evaluated by a retrospective comparison of duplex sonography and angiography. Twenty-three patients ...

BACKGROUND AND PURPOSE Carotid ultrasonography is being increasingly performed as the sole investigation to assess internal carotid artery (ICA) stenosis. A potential source of error in using ultrasound peak systolic velocity (PSV) measurements is that the redistribution of blood flow due to severe stenosis in a contralateral carotid artery may lead to artificially elevated values. METHODS Ul...

In 38 patients who underwent cerebrovascular evaluation followed by angiography the Doppler ultrasound scanning technique was found to be an excellent screening procedure for detecting marked stenosis (>50%) or occlusion of the internal carotid artery (93% correlation). It is noninvasive, easily reproducible and can be performed by a qualified technician. The major problems are: the inability t...

In 38 patients who underwent cerebrovascular evaluation followed by angiography the Doppler ultrasound scanning technique was found to be an excellent screening procedure for detecting marked stenosis (greater than 50%) or occlusion of the internal carotid artery (93% correlation). It is noninvasive, easily reproducible and can be performed by a qualified technician. The major problems are: the...

BACKGROUND AND PURPOSE Stenosis of the carotid artery may be a cause of reduced cognitive performance that can be ameliorated with placement of a stent. The goal of this study was to measure cognitive performance and speed of psychomotor performance prospectively before and after carotid stent placement. MATERIALS AND METHODS Patients referred for stent placement for a unilateral carotid arte...

Carotid Endarterectomy (CEA) performed in combination with coronary artery bypass grafting (CABG) have also increased steadily since Bernhard and colleague’s initial report in 1972. Coexistence of symptomatic coronary artery disease and significant carotid artery stenosis ranges from 3.4% to 22%. The incidence of postoperative stroke after CABG ranges from 0.7% to 5%. Coronary revascularization...

Background and Purpose—Patients with a carotid artery stenosis, including those with an asymptomatic or moderate stenosis, have a considerable risk of ischemic stroke. Identification of risk factors for cerebrovascular disease in these patients may improve risk profiling and guide new treatment strategies. We cross-sectionally investigated whether carotid stiffness is associated with previous i...

In 38 patients who underwent cerebrovascular evaluation followed by angiography the Doppler ultrasound scanning technique was found to be an excellent screening procedure for detecting marked stenosis (>50%) or occlusion of the internal carotid artery (93% correlation). It is noninvasive, easily reproducible and can be performed by a qualified technician. The major problems are: the inability t...

Carotid artery stenosis is a major risk factor for ischemic stroke. Currently, carotid endarterectomy (CEA) the surgical treatment of choice stenosis. stenting (CAS) increases CAS one options available, particularly high-risk CEA patients. Although has advantages being less invasive, causing patient discomfort, and requiring shorter hospital stay, some patients may develop in-stent restenosis (...

BACKGROUND During carotid revascularisation, embolic material originating from unstable atherosclerotic plaques and thrombi forming within the stent is generated. The significance of a cerebral embolism in the first days after restoring the patency of the arteries has not been established. AIM To evaluate the occurrence of microembolic signals in the middle cerebral artery on the day precedin...