نتایج جستجو برای: stenosis severity

تعداد نتایج: 214050  

2016
Hironori Kitabata Kohei Ishibashi Kenichi Komukai Takashi Tanimoto Yasushi Ino Hiroko Nakanishi Keizo Kimura Kumiko Hirata Masato Mizukoshi Toshio Imanishi Takashi Akasaka

Background: Optical coherence tomography (OCT) allows us to evaluate not only the qualitative coronary lesion morphology but also the quantitative anatomical severity of coronary stenosis. Fractional flow reserve (FFR) is an established index to evaluate the functional severity of a coronary stenosis. The aim of this study was to determine the OCT parameters for physiological severity of corona...

حریرچیان, محمدحسین, خمسه, فاطمه , رزازیان, نازنین , غفارپور, مجید ,

This is a prospective descriptive research which was carried out in Imam Khomeini Hospital related to Tehran University during two years (1375-1377) in order to study the incidence of internal carotid stenosis in patients who suffered from TIA ot minor stroke. It was evaluated by duplex sonography. Risk factors of carotid stenosis were studied. 1052 patients who had cerebrovascular accident adm...

2010
Balaji K. Tamarappoo Ariel Gutstein Victor Y. Cheng Ryo Nakazato Heidi Gransar Damini Dey Louise E. J. Thomson Sean W. Hayes John D. Friedman Guido Germano Piotr J. Slomka Daniel S. Berman

BACKGROUND The relationship between luminal stenosis measured by coronary CT angiography (CCTA) and severity of stress-induced ischemia seen on single photon emission computed tomographic myocardial perfusion imaging (SPECT-MPI) is not clearly defined. We sought to evaluate the relationship between stenosis severity assessed by CCTA and ischemia on SPECT-MPI. METHODS AND RESULTS ECG-gated CCT...

اسماعیلی شهمیرزادی, سیما, حاجی میری, خدیجه, سیفی ماکرانی, اعظم, محسنی پویا, حسین, هاشمی امرئی, سید حسین, گلشنی, صمد,

Background and purpose: Cardiovascular diseases are the leading cause of death worldwide, accounting for 17 million deaths annually. Poor lifestyle is one of the factors influencing the incidence of some cardiovascular diseases such as coronary artery stenosis. The purpose of this study was to investigate the relationship between health promoting behaviors and severity of coronary artery stenos...

Journal: :مکانیک سیالات و آیرودینامیک 0
علی عباس¬نژاد محمود نوروزی زکیه طالبی

the purpose of this research is to numerically investigate the interaction of pulsatile flow of blood with an axisymmetric artery in various percentages of stenosis. the carreau non-newtonian model and the generalized maxwell rheological model were used to model the blood fluid and the viscoelastic wall of arterial, respectively. the innovation of the present research is modeling of viscoelasti...

تقی لو, سعید, حیدری, علی, رحیمی, حمیده, عجمی, ابوالقاسم, عسگریان عمران, حسین, علیزاده نوایی, رضا, پیغمبری, محمد مهدی, گابله, فاطمه,

Background and purpose: Circulating monocytes are divided into different subpopulations according to the expression of CD14 and CD16. In this study, we investigated the correlation between the severity of coronary artery disease (CAD) and the frequency of two monocyte subsets and also expression level of CCR1 receptor on these monocytes.   Materials and methods: The study was conducted in 88 p...

Journal: :Medical ultrasonography 2016
Dacian-Călin Tirinescu Cosmina Ioana Bondor Dan Ştefan Vlăduțiu Ioan Mihai Pațiu Diana Moldovan Remus Orășan Ina Maria Kacsó

AIMS Ultrasound (US) examination is an important tool in the diagnosis of arteriovenous (AVF) stenoses; different US measures are available for assessing the severity of stenoses. The aim of our study was to analyse risk factors and consequences of AVF stenosis and its severity and to compare the usefulness of different US measures of stenoses' severity. MATERIAL AND METHODS Ninety-seven prev...

Journal: :American journal of physiology. Heart and circulatory physiology 2013
Ashkan Javadzadegan Andy S C Yong Michael Chang Austin C C Ng John Yiannikas Martin K C Ng Masud Behnia Leonard Kritharides

Flow recirculation zones and shear rate are associated with distinct pathogenic biological pathways relevant to thrombosis and atherogenesis. The interaction between stenosis severity and lesion eccentricity in determining the length of flow recirculation zones and peak shear rate in human coronary arteries in vivo is unclear. Computational fluid dynamic simulations were performed under resting...

Journal: :The Open Cardiovascular Medicine Journal 2008
Daniel Bexell Randolph M Setser Paul Schoenhagen Michael L Lieber Sorin J Brener Thomas B Ivanc Eva M Balazs Thomas P O`Donnell Arthur E Stillman Håkan Arheden Galen S Wagner Richard D White

OBJECTIVES In patients with chronic ischemic heart disease, the relationship between coronary artery lesion severity and myocardial scarring is unknown.The purpose of this study was to examine the relationship between proximal coronary artery stenosis severity, the amount of coronary collateralization, and myocardial scar extent in the distal distribution of the affected coronary artery based o...

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