Results 41 to 50 of about 2,544,811 (316)

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  

Study on the Accuracy of Structural and FSI Heart Valves Simulations

Cardiovascular Engineering and Technology, 2018
The performance of heart valves, either native or artificial, can be evaluated by means of finite element analyses, either from a structural or a fluid–structure interaction (FSI) point of view. The latter captures the coupling between the valve leaflets
Giulia Luraghi, F. Migliavacca, J. R. Rodríguez Matas   +2 more
semanticscholar   +1 more source

Substituição valvar por valva aórtica homóloga montada em suporte e preservada pelo glutaraldeído: estudo multicêntrico Valvar replacement with a glutaraldehyde preserved stent-mounted homologous aortic valve: a multicenter study

Brazilian Journal of Cardiovascular Surgery, 1988
A substituição valvar por valva aórtica homóloga montada em suporte flexível e preservada pelo glutaraldeído é procedimento original e informações preliminares já foram relatadas anteriormente.
Ênio Buffolo, Cláudio A Salles, José Vanderley Neto, José Telles de Mendonça, Ivan S. Joviano Casagrande, José Carlos S Andrade, Honório Palma   +6 more
doaj   +1 more source

Hemodynamics of a Bileaflet Mechanical Heart Valve with Different Levels of Dysfunction [PDF]

Volume 2 Issue 5 - 2017, 2017
Heart disease is one of leading causes of mortality worldwide. Healthy heart valves are key for proper heart function. When these valves dysfunction, a replacement is often necessary in severe cases. The current study presents an investigation of the pulsatile blood flow through a bileaflet mechanical heart valve (BMHV) where one leaflet is healthy and
arxiv   +1 more source

Recellularization of decellularized heart valves: Progress toward the tissue-engineered heart valve

Journal of Tissue Engineering, 2017
The tissue-engineered heart valve portends a new era in the field of valve replacement. Decellularized heart valves are of great interest as a scaffold for the tissue-engineered heart valve due to their naturally bioactive composition, clinical relevance
M. VeDepo, M. Detamore, R. Hopkins, G. Converse   +3 more
semanticscholar   +1 more source

View Classification and Object Detection in Cardiac Ultrasound to Localize Valves via Deep Learning [PDF]

arXiv, 2023
Echocardiography provides an important tool for clinicians to observe the function of the heart in real time, at low cost, and without harmful radiation. Automated localization and classification of heart valves enables automatic extraction of quantities associated with heart mechanical function and related blood flow measurements. We propose a machine
arxiv  

Recommendations for the imaging assessment of prosthetic heart valves: a report from the European Association of Cardiovascular Imaging endorsed by the Chinese Society of Echocardiography, the Inter-American Society of Echocardiography, and the Brazilian Department of Cardiovascular Imaging.

European Heart Journal-Cardiovascular Imaging, 2016
Prosthetic heart valve (PHV) dysfunction is rare but potentially life-threatening. Although often challenging, establishing the exact cause of PHV dysfunction is essential to determine the appropriate treatment strategy.
P. Lancellotti, P. Pibarot, J. Chambers, T. Edvardsen, V. Delgado, R. Dulgheru, M. Pepi, B. Cosyns, M. Dweck, M. Garbi, J. Magne, K. Nieman, R. Rosenhek, A. Bernard, J. Lowenstein, M. C. Vieira, A. Rabischoffsky, Rodrigo Hernández Vyhmeister, Xiao Zhou, Yun Zhang, J. Zamorano, G. Habib   +21 more
semanticscholar   +1 more source

Dental procedures, antibiotic prophylaxis, and endocarditis among people with prosthetic heart valves: nationwide population based cohort and a case crossover study

British medical journal, 2017
Objective To assess the relation between invasive dental procedures and infective endocarditis associated with oral streptococci among people with prosthetic heart valves. Design Nationwide population based cohort and a case crossover study.
S. Tubiana, P. Blotière, B. Hoen, P. Lesclous, S. Millot, J. Rudant, A. Weill, J. Coste, F. Alla, X. Duval   +9 more
semanticscholar   +1 more source

Microscopic and ultramicroscopic characteristic of heart valves in human [PDF]

Морфологія, 2014
Background. Valvular apparatus of the heart is the frequent object of the surgical operations for today. Morphological changes which are happed within valves of the heart at time of cardiac diseases the modern medicine considers on the clinical ...
Fedoniuk L., Semeniuk T., Bodnar E.
doaj  

Loss of primary cilia promotes EphA2‐mediated endothelial‐to‐mesenchymal transition in the ovarian tumor microenvironment

Molecular Oncology, EarlyView.
Loss of primary cilia in endothelial cells promotes EndMT and vascular abnormalities in the ovarian tumor microenvironment through EphA2 activation. Using human samples, in vitro models, and endothelial‐specific Kif3a‐knockout mice, we show that primary cilia loss drives the acquisition of cancer‐associated fibroblast‐like phenotypes, thereby ...
Jin Gu Cho, Yubin Hah, Eunsik Yun, Hye In Ka, Aram Lee, Sora Han, Dawn Lee, Sung Wook Kim, Jong Hoon Park, Byung Su Kwon, Young Yang, Jongmin Kim   +11 more
wiley   +1 more source