Results 41 to 50 of about 127,736 (302)
Modeling the Mitral Valve [PDF]
arXiv, 2022 This thesis is concerned with modeling and simulation of the mitral valve, one of the four valves in the human heart. The valve is composed of leaflets attached to a ring, the free edges of which are supported by a system of chordae, which themselves are anchored to muscles inside the heart.
arxiv
Echo Research and Practice, 2019 Objectives: The aortic annulus diameter measured by transthoracic echocardiography yields lower values than by computed tomography, and echo-based selection of transcatheter aortic valve prosthesis size has been implied to result in more frequent ...
I J Ingimarsdóttir +2 more
doaj +1 more source
Reviews in Cardiovascular Medicine, 2021 The clinical use indications for transcatheter aortic valve replacement (TAVR) for the treatment of severe symptomatic aortic stenosis (AS) have expanded from patients at high surgical risk to those at low risk based on the results of multiple large ...
Jian-Di Liu +4 more
doaj +1 more source
Comparison of Immersed Boundary Simulations of Heart Valve Hemodynamics against In Vitro 4D Flow MRI Data [PDF]
, 2021 The immersed boundary (IB) method is a mathematical framework for fluid-structure interaction problems (FSI) that was originally developed to simulate flows around heart valves. Direct comparison of FSI simulations around heart valves against experimental data is challenging, however, due to the difficulty of performing robust and effective simulations,
arxiv +1 more source
Biointerphases, 2016 In the cardiovascular system, the endothelial layer provides a natural antithrombogenic surface on the inner portion of the heart and associated vessels.
H. Ghanbari +6 more
semanticscholar +1 more source
Prosthesis-Patient Mismatch Predicts Structural Valve Degeneration in Bioprosthetic Heart Valves [PDF]
Circulation, 2010 Background— Prosthesis-patient mismatch (P-PtM) after aortic valve replacement results in disturbed valve performance associated with increased pressure gradients. However, it is unknown whether this can be related to future structural valve deterioration (SVD) of the bioprosthesis.
Kris Bogaerts +5 more
openaire +3 more sources
A Computational Framework for Atrioventricular Valve Modeling using Open-Source Software [PDF]
arXiv, 2022 Atrioventricular valve regurgitation is a significant cause of morbidity and mortality in patients with acquired and congenital cardiac valve disease. Image-derived computational modeling of atrioventricular valves has advanced substantially over the last decade and holds particular promise to inform valve repair in small and heterogeneous populations ...
arxiv
Effects of stenotic aortic valve on the left heart hemodynamics: a fluid-structure-electrophysiology approach [PDF]
arXiv, 2021 The aortic valve is a three-leaflet passive structure that, driven by pressure differences between the left ventricle and the aorta, opens and closes during the heartbeat to ensure the correct stream direction and flow rate. In elderly individuals or because of particular pathologies, the valve leaflets can stiffen thus impairing the valve functioning ...
arxiv
“Valve-On-Valve” — an alternative method of surgical treatment of tissue valve dysfunctions
Российский кардиологический журнал, 2019 Every year, the frequency of use of biological prostheses for treatment of valvular heart disease increases.The implantation of a biological prosthesis allows avoiding lifelong anticoagulant therapy, but at the same time it may require further ...
N. V. Rogulina, I. K. Khalivopulo
doaj +1 more source
Experience in the development of a system for repeated prosthetic heart valves
Сибирский научный медицинский журнал, 2023 The failure of heart valve bioprostheses, requiring repeated intervention to replace them, is a serious drawback that narrows the scope of such devices.
E. A. Ovcharenko +12 more
doaj +1 more source