نتایج جستجو برای: middle cerebral arteries
تعداد نتایج: 371638 فیلتر نتایج به سال:
Bishai, John M., Luit Penninga, Roel Nijland, Rogier Meulenaar, Ciprian P. Gheorghe, Yu Zhao, John N. Buchholz, Lubo Zhang, and Lawrence D. Longo. Preand postjunctional 2-adrenergic receptors in fetal and adult ovine cerebral arteries. Am J Physiol Regulatory Integrative Comp Physiol 282: R1654–R1662, 2002; 10.1152/ajpregu. 00475.2001.—In ovine cerebral arteries, adrenergic-mediated vasoconstri...
BACKGROUND AND PURPOSE Microemboli observed during coronary angiography can cause silent ischemic cerebral lesions. The aim of this study was to investigate if the number of particulate cerebral microemboli during coronary angiography is influenced by access site used. METHODS Fifty-one patients with stable angina pectoris referred for coronary angiography were randomized to right radial or r...
Vasodilatory responses to progressive reductions in intravascular pressure or to calcitonin gene-related peptide (CGRP) or cromakalim were determined in rodent middle cerebral arteries (MCAs) before and after treatment with peroxynitrite (ONOO-). Middle cerebral artery diameters in isolated, pressurized MCAs were measured as intravascular pressure was reduced from 100 to 20 mm Hg in 20-mm Hg in...
BACKGROUND AND PURPOSE Cardiovascular disease risk predicts cognitive decline although the mechanisms underpinning this association remain unclear. Increasing cardiovascular risk may impair cerebral blood flow predisposing to cerebrovascular damage, cognitive decline, and dementia. METHODS This study examined the association between the Framingham General Cardiovascular Risk Profile and cereb...
Subarachnoid hemorrhage caused by dural arteriovenous fistula of the sphenobasal sinus--case report.
A 59-year-old woman presented with a rare middle fossa dural arteriovenous fistula (AVF) unrelated to the cavernous sinus manifesting only as subarachnoid hemorrhage. Angiography revealed shunts between the meningeal branches of both the internal and external carotid arteries and the sphenobasal sinus. The AVF drained into the superficial middle cerebral vein (SMCV) which had a varix and an ana...
BACKGROUND AND PURPOSE Microemboli generated during dissection of the carotid arteries in patients undergoing carotid endarterectomy result in postoperative cerebral ischemic events. The purpose of this study was to determine whether these events correlate with middle cerebral artery blood flow velocity. METHODS One hundred sixty-three patients with ipsilateral internal carotid artery stenosi...
BACKGROUND AND PURPOSE Anatomic imaging of patients with chronic well-treated hypertension has demonstrated dilatation of the lateral cerebral ventricles and left brain atrophy, whereas positron emission tomography has shown only subtle reductions in regional cerebral metabolic rates for glucose in some subcortical nuclei. To further explore the implications of the imaging changes, an analytic ...
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