.... In the computations, the shear thinning behavior of blood is accounted for by the Carreau–Yasuda model. Computational results are compared and found to be inline with available experimental data. stenosis non-Newtonian FVM simulation wall shear magnetic field The study of the blood stream has...

... to determine the severity of a coronary artery stenosis. FFR is defined as the ratio of hyperemic pressures distal ( p ˜ rh ) and proximal ( p ˜ ah ) to a stenosis. CFR is the ratio of flow at hyperemic and basal condition. Another diagnostic parameter suggested by our group...

... contribute to an improved clinical understanding of MAC-related mitral stenosis. Moreover, they provide the ability to statistically evaluate between measurement locations, flow rates, and valve geometries for Doppler-derived pressure gradients. Determining these end points will contribute to greater...

... of blood vessels and that of abrupt rupture or hemorrhage of atherosclerotic plaque. Such rupture can be catastrophic and is difficult to predict. Currently, clinical assessments of plaque vulnerability are based largely on the percent stenosis, or how much the plaque narrows the arterial lumen diameter...

...Leonie Rouleau; Joanna Rossi; Richard L. Leask Inflammation plays a key role in the development and stability of coronary plaques. Endothelial cells alter their expression in response to wall shear stress (WSS). Straight/tubular and asymmetric stenosis models were designed to study the localized...

...Dalin Tang; Chun Yang; Shunichi Kobayashi; David N. Ku Severe stenosis may cause critical flow and wall mechanical conditions related to artery fatigue, artery compression, and plaque rupture, which leads directly to heart attack and stroke. The exact mechanism involved is not well understood...

...Sylvie Lorthois; Pierre-Yves Lagre´e, Charge´ de Recherche,; Jean-Pierre Marc-Vergnes, Directeur de Recherche; Francis Cassot, Charge´ de Recherche Maximal wall shear stress (MWSS) in the convergent part of a stenosis is calculated by the interactive boundary-layer theory. A dimensional analysis...