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5 de jun. de 2023 · The figure shows a cross-section of a coronary artery and summarizes the different coronary stenosis and atherosclerosis imaging targets and the appropriateness of each imaging modality for...
21 de may. de 2013 · The major epicardial coronary arteries (left main trunk, left anterior descending, left circumflex branches, and right coronary artery) were visually inspected with respect to their origin and course, and cut transversely at 2-mm intervals to the severity of artery stenosis by 2 experienced pathologists, using American Heart ...
7 de jul. de 2017 · Methods and Results—. In 1382 coronary stenoses (1104 patients), percent diameter stenosis by visual estimation (DS VE) and by quantitative coronary angiography (DS QCA) was compared with FFR. Patients were divided into 4 subgroups, according to the presence of RFs, and the relationship between DS VE, DS QCA, and FFR was analyzed.
30 de nov. de 2021 · The images were anonymized, and two different views showing worst angiographic stenosis were selected for each lesion for which FFR was available. These views were included in a web-based annotation application which was developed for the purpose of this study.
15 de ago. de 2021 · Computational fluid dynamics modelling was used to calculate vFFRs using the VIRTUheart™ system. Percentage lesion severity had the greatest effect upon FFR. Any ≥80% diameter stenosis in two views (i.e. concentric) was physiologically significant (FFR ≤ 0.80), irrespective of length, shape, or vessel diameter.
28 de dic. de 2021 · An ideal coronary angiogram should be divided in 4 phases: Phase 0: 1–2 s without contrast: visualization of calcification and stents. Phase 1: contrast injection with evaluation of filling velocity (TIMI flow ) and filling defects (stenosis)/occlusion.
22 de dic. de 2009 · However, demonstration of stenosis or retrograde flow in the main coronary arteries by TTE is dependent on optimal visualisation of the different segments of each main coronary artery. The aim of this study was to assess the feasibility of TTE to visualise the complete segments of the LM, LAD, Cx and RCA in a larger set of patients.
