Enhancing coronary Wave Intensity Analysis robustness by high order central finite differences
نویسندگان
چکیده
منابع مشابه
Analysis of High-Order Finite Elements for Convected Wave Propagation
In this paper we examine the performance of high-order finite element methods (FEM) for aeroacoustic propagation, based on the convected Helmholtz equation. A methodology is presented to measure the dispersion and amplitude errors of the p-FEM, including non-interpolating shape functions, such as ‘bubble’ shape functions. A series of simple test cases are also presented to support the results o...
متن کاملWave-intensity analysis: a new approach to coronary hemodynamics.
In 10 anesthetized dogs, we measured high-fidelity left circumflex coronary (P(LCx)), aortic (P(Ao)), and left ventricular (P(LV)) pressures and left circumflex velocity (U(LCx); Doppler) and used wave-intensity analysis (WIA) to identify the determinants of P(LCx) and U(LCx). Dogs were paced from the right atrium (control 1) or right ventricle by use of single (control 2) and then paired pacin...
متن کاملFeasibility of cardiovascular magnetic resonance derived coronary wave intensity analysis
BACKGROUND Wave intensity analysis (WIA) of the coronary arteries allows description of the predominant mechanisms influencing coronary flow over the cardiac cycle. The data are traditionally derived from pressure and velocity changes measured invasively in the coronary artery. Cardiovascular magnetic resonance (CMR) allows measurement of coronary velocities using phase velocity mapping and der...
متن کاملA step toward clinically applicable noninvasive coronary wave intensity analysis.
THE MECHANISMS UNDERLYING a striking diastolic predominance of left ventricular coronary arterial blood flow have been the subject of intensive investigation for many years, starting with the first reliable measurements of phasic coronary arterial flow by Gregg and Green (9) in 1940. Subsequent detailed and elegant experimental studies (3, 20, 23-25) have shown that an increased coronary perfus...
متن کاملWave intensity analysis and its application to the coronary circulation
Wave intensity analysis (WIA) is a technique developed from the field of gas dynamics that is now being applied to assess cardiovascular physiology. It allows quantification of the forces acting to alter flow and pressure within a fluid system, and as such it is highly insightful in ascribing cause to dynamic blood pressure or velocity changes. When co-incident waves arrive at the same spatial ...
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ژورنال
عنوان ژورنال: Artery Research
سال: 2014
ISSN: 1876-4401
DOI: 10.1016/j.artres.2014.03.001