TURBULENT VELOCITY MEASUREMENTS IN A MODEL OF AORTIC STENOSIS*
TURBULENT VELOCITY MEASUREMENTS IN A MODEL OF AORTIC STENOSIS* c. CLARK Department of Engineering Science, University of Oxford, Oxford, England Abstract The occurrence of turbulence in valvular stenosis has ... Access Full Source
Audible Coronary Artery Stenosis - Amjmed.com
Acoustic signal spectrum of stenosis-related turbulence, however, is complex and beyond the range of unassisted human auscultation. Bruits from coronary artery stenosis (i.e. intracoronary murmurs) have been historically ... Retrieve Doc
Subclavian Artery - Wikipedia, The Free Encyclopedia
Schematic of the proximal aorta and its branches. The left subclavian artery is the fifth branch of the aorta and the third branch from the arch of the aorta. ... Read Article
Heart Valve Diseases - About.com Health
Heart valve diseases explained in easy to understand language. also known as valvular incompetence or insufficiency, is a problem with the heart valve that causes turbulence and backward movement of blood. Stenosis is a thickening or stiffening of the heart valve leaflets. ... Read Article
Evaluation Of Velocity Profiles, Stenoses And turbulence ...
Evaluation of velocity profiles, stenoses and turbulence using continuous-wave Dopplec ultrasound k Dissertation Submitted to the Graduate Faculty in Partial Fulfillment of ... View Full Source
Two-equation Turbulence Modeling Of Pulsatile Flow In A J ...
Stenosis, indicating no turbulence throughout the pulse cycle. In contrast, under the same pulsatile condition in the 90% stenosis, fluctuations begin to appear during the peak phase of the cycle at and beyond Z52.5. At Z54.0 the fluctuations are reported to be ... Fetch Full Source
Modeling Transition To Turbulence In Eccentric Stenotic Flows
Eccentric stenosis. Many of the widely used turbulence models, including a large eddy simulation model, were unable to accurately capture the post-stenotic transition to turbulence. The results suggest that e orts towards developing more accurate turbulence models for low Reynolds num- ... Document Viewer
THE PROPAGATION OF TURBULENCE PRODUCED BY A STENOSIS*
J Bwmechanics Vol. 13. PP. 591~6CM i( Pergamon Press Ltd 1980 Printed in Great Bntam cQ21.9290/80~701-0~91 502.00/r THE PROPAGATION ... Fetch Doc
Hemodynamics Of Arterial Vascular Disease - Ohio University
• Disruption of laminar flow causes turbulence • Regions of stenosis, with increased flow velocity, can cause turbulence, particularly distal to stenosis (Flow = Velocity x Area, ... Retrieve Here
Turbulence And Circulating Cerebral Emboli Detectable At ...
Turbulence and Circulating Cerebral Emboli Detectable at Doppler Ultrasonography: A Differentiation Study in a Stenotic Middle Cerebral Artery Model ... Return Document
Analyzing Transient Turbulence In A Stenosed Carotid Artery ...
Analyzing Transient Turbulence in a Stenosed Carotid Artery by Proper Orthogonal Decomposition The stenosis may trigger transition to turbu-lence, and onset of turbulence downstream of severe occlusions has been observed in laboratory experi- ... Access Full Source
Evidence That Turbulence Is Not The Cause Of Poststenotic ...
977 Evidence That Turbulence Is Not the Cause of Poststenotic Dilatation in Rabbit Carotid Arteries Matadial Ojha and B. Lowell Langille The purpose of this study was to relate local blood flow conditions to the development of poststenotic ... Access Doc
MME TV: The Carotid Artery Exam - YouTube
Join Dr. Shepherd as he walks you through the carotid ultrasound exam. This case contains different types of plaque including intimal thickening, calcified and non-shadowing plaque. He discusses color Doppler, scale, aliasing and turbulence. He then moves into a description of the ... View Video
A Finite Element Analysis Of turbulent Eccentric Stenotic ...
A finite element analysis of turbulent eccentric stenotic flows Blood flows with stenosis may cause turbulence. In such a case, vessels may be damaged by the turbulent flow because the velocity gradient of turbulent flow is large near the wall. ... Retrieve Document
Transition To Turbulence In Pulsatile Stenotic Flows: A ...
2003 Summer Bioengineering Conference, June 25-29, Sonesta Beach Resort in Key Biscayne, Florida INTRODUCTION Narrowing of a blood vessel, or stenosis, due to substantial ... View Doc
Journal Of Turbulence Direct Numerical Simulation Of Flow In ...
Journal of Turbulence Vol. 10, No. 41, 2009, 1–16 Direct numerical simulation of flow in stenotic channel to understand the effect of stenotic morphology on turbulence ... Access Document
Turbulent Blood Flow In The Ascending Aorta Of Humans With ...
Humans with Normal and Diseased Aortic Valves PAUL D. STEIN, M.D., AND HANI N. SABBAH In subjects with aortic stenosis, turbulence was observed throughout the ascending aorta and in the innominate artery . In others, th e turbulenc dissipated mor proximally Th ... Read Here
Evaluation Of Distal turbulence Intensity For The Detection ...
ULTRASOUND Evaluation of distal turbulence intensity for the detection of both plaque ulceration and stenosis grade in the carotid bifurcation using clinical Doppler ultrasound ... Read Document
THE EFFECT OF VARYING DEGREES OF STENOSIS ON THE ...
THE EFFECT OF VARYING DEGREES OF STENOSIS ON THE CHARACTERISTICS OF TURBULENT PULSATILE FLOW THROUGH HEART VALVES D. Bluestein valve turbulence extends throughout the major por- tion of the ejection (Sabbah and Stein, 1976). ... Visit Document
Fourth Heart Sound - Wikipedia, The Free Encyclopedia
This causes abnormal turbulence in the flow of blood that can be detected by a stethoscope. Associations The S 4 aortic stenosis [8] (causes ventricular hypertrophy) overloading of the ventricle (causes ventricular hypertrophy) ... Read Article
NUMERICAL STUDY OF PHYSIOLOGICAL TURBULENT FLOWS THROUGH ...
Turbulence can be expected distal to the stenosis. Because the unsteady turbulence experiments are very di cult to implement, only a few fundamental experimental Numerical Study of Physiological Turbulent Flows Through Stenosed Arteries 657 0 0.2 0.4 0.6 0.8 1 1.2 1.4 ... Access This Document
No comments:
Post a Comment