The novel Residence Time (RT) method successfully detected regions with a high risk of stenosis and restenosis, quantified actual RT, and visualized recirculation zones using pathlines in the lumen.
Does a novel absolute residence time (RT) method improve the characterization of hemodynamics in stenosed and stented coronary arteries compared to the relative residence time (RRT) method?
A novel computational method for calculating absolute blood residence time provides actual quantification and flow pathlines, offering a more detailed hemodynamic assessment of coronary stenosis and stenting than the traditional relative method.
Computational fluid dynamic-based modeling is commonly used in stenosed and stented coronary artery to characterize blood flow and identify hemodynamics factors that could lead to coronary stenosis. One such factor is the residence time (RT), which is important for investigating stenosis and restenosis progression. The current method to calculate RT, known as the relative residence time (RRT) method, does not provide the original scale of RT and only provides a relative value. We recently introduced a novel method, designated as RT method, based on developing the advection-diffusion equation with a scalar to calculate the absolute residence time. The goal of this study was to compare both methods. Our results show that both could detect regions with a high risk of stenosis and restenosis, but the RT method is also able to show the recirculation zone using pathlines in the lumen and quantify actual RT. Moreover, RT method also provided blood flow pathlines, and is correlated to wall shear stress (WSS), oscillatory shear index (OSI), RRT, and Localized Normalized Helicity (LNH) which are other critical factors to gauge stenosis severity and assess stenting in bifurcations coronary.
Hashemi et al. (Mon,) conducted a other in Coronary artery stenosis and stented bifurcation (n=3). Residence Time (RT) method vs. Relative Residence Time (RRT) method was evaluated on Detection of regions with high risk of stenosis and restenosis and quantification of actual residence time. The novel Residence Time (RT) method successfully detected regions with a high risk of stenosis and restenosis, quantified actual RT, and visualized recirculation zones using pathlines in the lumen.
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