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Analysis of the hemodynamic impact of coronary plaque morphology in mild coronary artery stenosis.
Comput Methods Programs Biomed
January 2025
Department of Mechanics & Engineering, College of Architecture & Environment, Sichuan University, Chengdu 610065, China; Sichuan University Yibin Park / Yibin Istitute of Industrial Technology, Yibin 644000, China. Electronic address:
Objectives: As is well known, plaque morphology plays an important role in the hemodynamics of stenotic coronary arteries, thus their clinic outcomes. However, so far, there has been no research on how the cross-sectional shape of a stenotic lumen affects its hemodynamics. Therefore, this study aims to explore the impact of plaque cross-sectional shape on coronary hemodynamics under mild or moderate stenosis conditions (diameter stenosis degree ≤50 %).
View Article and Find Full Text PDFNon-Canonical TERT Activity Initiates Osteogenesis in Calcific Aortic Valve Disease.
Circ Res
January 2025
Division of Cardiology, Department of Medicine, Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, PA. (R.A.C., C.C.C., R.W., A.C., C.B., C.R., W.J.M., M.J. Bashline, A.P., A.M.P., P.B., M.J. Brown, C.S.H.).
Background: Calcific aortic valve disease is the pathological remodeling of valve leaflets. The initial steps in valve leaflet osteogenic reprogramming are not fully understood. As TERT (telomerase reverse transcriptase) overexpression primes mesenchymal stem cells to differentiate into osteoblasts, we investigated whether TERT contributes to the osteogenic reprogramming of valve interstitial cells.
View Article and Find Full Text PDFManipulating Mechanical Forces in the Developing Zebrafish Heart Using Magnetic Beads.
J Vis Exp
January 2025
Department of Bioengineering, Imperial College London; The Francis Crick Institute;
Mechanical forces continuously provide feedback to heart valve morphogenetic programs. In zebrafish, cardiac valve development relies on heart contraction and physical stimuli generated by the beating heart. Intracardiac hemodynamics, driven by blood flow, emerge as fundamental information shaping the development of the embryonic heart.
View Article and Find Full Text PDFA multi-modal computational fluid dynamics model of left atrial fibrillation haemodynamics validated with 4D flow MRI.
Biomech Model Mechanobiol
January 2025
Laboratoire d'Imagerie Biomédicale (LIB), Institut National de La Recherche Médicale (INSERM), Centre National de La Recherche Scientifique (CNRS), Sorbonne Université, Paris, France.
Atrial fibrillation (AF) is characterized by rapid and irregular contraction of the left atrium (LA). Impacting LA haemodynamics, this increases the risk of thrombi development and stroke. Flow conditions preceding stroke in these patients are not well defined, partly due the limited resolution of 4D flow magnetic resonance imaging (MRI).
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