نتایج جستجو برای: carotid wall vibrations

تعداد نتایج: 231606  

2015
E.S.J. Kröner J. van der Grond J.J.M. Westenberg E.E. van der Wall H.-M.J. Siebelink H.J. Lamb

OBJECTIVE Atherosclerotic large vessel disease is potentially involved in the pathogenesis of cerebral small vessel disease related to occurrence of white matter lesions (WMLs) in the brain. We aimed to assess morphological and functional carotid vessel wall properties in relation to WML using magnetic resonance imaging (MRI) in myocardial infarction (MI) patients. MATERIALS AND METHODS A tot...

Journal: :Journal of vascular and interventional neurology 2013
Nassir Rostambeigi Rakesh Khatri Ameer E Hassan Adnan I Qureshi

Carotid artery occlusion is a major risk factor for ischemic stroke. Endovascular treatment of carotid artery occlusion in high-risk patients offers a therapeutic option to reduce subsequent ischemic events. The technical success and avoidance of complications of the endovascular recanalization of occluded carotid artery is contingent on proper visualization of the vessel wall. To highlight the...

Journal: :Stroke 1999
J Topouchian R Asmar F Sayegh A Rudnicki A Benetos A M Bacri M E Safar

BACKGROUND AND PURPOSE Converting enzyme inhibition and calcium blockade alter large arteries in hypertension. However, the heterogeneity of the response according to the site of cardiovascular measurements has never been investigated. METHODS In a double-blind study, we compared for 180 days 3 hypertensive patient groups treated with verapamil, trandolapril, or their combination. Using echo-...

Journal: :anatomical sciences journal 0
mohsen noorozian department of biology and anatomical sciences, school of medicine, shahid beheshti university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) mohammad bayat department of biology and anatomical sciences, school of medicine, shahid beheshti university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) reza mastery farahani department of biology and anatomical sciences, school of medicine, shahid beheshti university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) mohammad-amin abdollahifar department of biology and anatomical sciences, school of medicine, shahid beheshti university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) hadi azimi department of english language teaching, school of medicine, shahid beheshti university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) ali noori-zadeh department of medical sciences, shahrood branch, islamic azad university, shahrood, iran.سازمان اصلی تایید شده: دانشگاه آزاد اسلامی علوم و تحقیقات (islamic azad university science and research branch)

during the past few years, researchers and practitioners have developed novel techniques, using ansa cervicalis to innervate muscles of the larynx paralyzed due to surgical procedures carried out in the chest and neck areas. during routine dissection of a middle-age male cadaver, an unusual course of the superior root of the ansa cervicalis was observed. in this case, the superior root of the a...

Journal: :American journal of physiology. Heart and circulatory physiology 2007
A D Augst B Ariff S A G McG Thom X Y Xu A D Hughes

BACKGROUND Previous clinical studies have observed relationships between increased intima-media thickness (IMT) in the carotid artery, elevated blood pressure, and low wall shear stress (WSS) calculated from the Poiseuille equation. This study used numerical methods to more accurately determine WSS in the carotid artery and to investigate possible determinants of increased IMT. METHODS IMT [c...

2003
M. R. KAAZEMPUR-MOFRAD

Various mechanical phenomena are thought to contribute to the pathogenesis of atherosclerosis. Most finite-element analyses of arterial-wall mechanics to date have focused on the quantification of mechanical wall stresses, despite an abundance of experimental evidence suggesting that endothelial and smooth muscle cells readily respond to cyclic strain. In this study, we calculate the physiologi...

Journal: :iranian red crescent medical journal 0
mehravar rafati department of medical physics, faculty of paramedical sciences, kashan university of medical sciences, kashan, ir iran masoud arabfard department of health information management and technology, faculty of paramedical sciences, kashan university of medical sciences, kashan, ir iran; department of health information management and technology, faculty of paramedical sciences, kashan university of medical sciences, kashan, ir iran. tel: +98-9132649405 mehrdad rafati-rahimzadeh department of nursing, babol university of medical sciences, babol, ir iran

background common carotid artery (cca) ultrasound with measurement of intima-media thickness (imt) is a safe and noninvasive technique for assessing subclinical atherosclerosis and determining cardiovascular risks. moreover, the pattern of wall thickening in the brachial artery (ba) is rather diffuse compared to the carotid artery and may be a more sensitive indicator of long-term systemic expo...

Journal: :AJNR. American journal of neuroradiology 2013
R Magge B C Lau B P Soares S Fischette S Arora E Tong S Cheng M Wintermark

BACKGROUND AND PURPOSE Parameters other than luminal narrowing are needed to predict the risk of stroke more reliably, particularly in patients with <70% stenosis. The goal of our study was to identify clinical risk factors and CT features of carotid atherosclerotic plaques, in a retrospective cohort of patients free of stroke at baseline, that are independent predictors of incident stroke on f...

Journal: :Stroke 2016
Mahmud Mossa-Basha Adam de Havenon Kyra J Becker Danial K Hallam Michael R Levitt Wendy A Cohen Daniel S Hippe Matthew D Alexander David L Tirschwell Thomas Hatsukami Catherine Amlie-Lefond Chun Yuan

BACKGROUND AND PURPOSE Although studies have evaluated the differential imaging of moyamoya disease and atherosclerosis, none have investigated the added value of vessel wall magnetic resonance imaging (MRI). This study evaluates the added diagnostic value of vessel wall MRI in differentiating moyamoya disease, atherosclerotic-moyamoya syndrome (A-MMS), and vasculitic-MMS (V-MMS) with a multico...

Journal: :Magnetic resonance in medicine 2000
X Kang N L Polissar C Han E Lin C Yuan

High-resolution MRI may be used to monitor the progression of human carotid atherosclerosis by measuring the lumen and wall area changes over time. The purpose of this study was to analyze the precision of quantitative measurements of lumen and wall areas. Two independent MR scans near the carotid bifurcation were conducted on eight patients within 2 weeks. The error of lumen area measurement w...

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