Results 101 to 110 of about 117,950 (235)

Hemodynamic comparison of polyurethane trileaflet and tissue heart valve prostheses

, 1988
In this paper, a hemodynamic comparison of two polyurethane trileaflet heart valve prostheses with currently available biological tissue valve prostheses are made. The valves, sutured to a valve mounting ring are incorporated in a mock circulatory system
Wurzel, D., Pantalos, G., Chandran, K. B., Kolff, W. J., Schoephoerster, Richard T., Yu, L. S., Hansen, G.   +6 more
core  

The Caged-Ball Prosthesis 60 Years Later: A Historical Review of a Cardiac Surgery Milestone

, 2022
Sixty years ago, 2 cardiac operations dramatically influenced the survival of patients with valvular heart disease. The replacement of an aortic valve by Dwight Harken and of a mitral valve by Albert Starr with mechanical caged-ball valves, both in 1960,
Thiene, Gaetano, Milano, Aldo D., De Martino, Andrea, Bortolotti, Uberto, Milano, Aldo D, Barbera, Mila Della   +5 more
core   +1 more source

Validation of Aortic Blood Flow Simulations During Extracorporeal Circulation Using Phase Contrast Magnetic Resonance Imaging

Artificial Organs, EarlyView.
This is the first study assessing in vivo blood flow profiles during extracorporeal circulation (ECC) scenarios. Magnetic resonance imaging data served for the calibration of computational fluid dynamics algorithms, enabling accurate replication of the hemodynamic conditions.
Anna Kathrin Assmann, Sinje Reimers, Jonah S. Schrauder, Lei Qu, Xiangge Yin, Amir Moussavi, Artur Lichtenberg, Susann Boretius, Michael Neidlin, Alexander Assmann   +9 more
wiley   +1 more source

Bileaflet mechanical heart valves thrombosis: in vitro detection by artificial neural networks.

, 2010
Endothelial pannus and thrombus formation which usually deposit on bileaflet mechanical heart valves progressively lead to incomplete opening of the valve. At the final state, they block the hinge-leaflet mechanism and cause embolic events.
PENGO, VITTORIO, SUSIN, FRANCESCA MARIA, BOTTIO, TOMASO, BAGNO, ANDREA, BUSELLI R, TARZIA, VINCENZO, GEROSA, GINO, CAMBI A   +7 more
core  

Comparison of Intraoperative Doppler Flow Measurements and Algorithmic Flow Estimations in Patients Undergoing Durable Left Ventricular Assist Device Implantation

Artificial Organs, EarlyView.
Direct intraoperative HeartMate 3 LVAD flow measurements using an ultrasonic probe revealed consistently higher values by approximately 0.5 L/min compared to device‐estimated flows. This discrepancy remained stable across pump speed settings, highlighting the importance of distinguishing measured from estimated flow in HeartMate 3 patients.
Gaik Nersesian, Anna Stegmann, Daniel Lewin, Yuriy Hrytsyna, Leonard Pitts, Julius Kaemmel, Marian Kukucka, Alexander Mladenow, Lisa Garczarek, Julia Stein, Friedrich Kaufmann, Volkmar Falk, Evgenij Potapov, Pia Lanmueller   +13 more
wiley   +1 more source

Estudo multicêntrico da bioprótese porcina Labcor Multicenter study with porcine bioprosthetic Labcor valve

Brazilian Journal of Cardiovascular Surgery, 1988
No período de 1984-1988, foram estudados 514 pacientes, 288 do sexo feminino e 226 do sexo masculino, com idade de 36,8 ± 16,5 anos, submetidos a cirurgia cardíaca valvar com implante de bioprótese porcina Labcor.
Fernando A Lucchese, João Ricardo Santana, Ivo A Nesralla, Cláudio A Salles, Carlos S Figueiroa, Nílcio Cunha Lobo, Dielson T Sampaio, José Wanderley Neto, Rita de Cássia Veras, Gilvan Dourado, Daniel Torres, Antônio De Biaze, Josalmir Melo do Amaral, Orlando Gomes de Oliveira, Jefferson Chaves, José Telles de Mendonça   +15 more
doaj  

Case Series on Prosthetic Valve Thromboses Treated with Intravenous Thrombolysis at a Tertiary Teaching Hospital in Nairobi – Kenya

Journal of Kenya Association of Physicians
Valvular heart disease is a significant global health issue, particularly in developing countries where Rheumatic Heart Disease (RHD) is the leading cause.
John Otieno Odhiambo, Salim Salim Abdallah, Leonard Mzee Ngunga   +2 more
doaj   +1 more source

Identification of Autologous Tissue Sources and Optimization of a Treatment Method for Intraoperative Manufacturing of Heart Valve Constructs

Artificial Organs, EarlyView.
The use of autologous connective tissue, such as pericardium or peritoneum, combined with controlled tissue treatment, has the potential to result in a more durable heart valve prosthesis than current commercial prostheses. ABSTRACT Introduction Valvular heart disease remains a leading cause of morbidity and mortality. Current biological and mechanical
Marvin Steitz, Mahamuda Badhon Khan, Katharina Fritsch, Alexander Breitenstein‐Attach, Jana Katharina Betty Korbacher, Jordi Joaquin Modolell Y Mainou, Katrin Schrimpf, Robert Ramm, Sara Knigge, Katja Eildermann, Georg Arlt, Antonia Schulz, Jonathan Frederik Sebastian Kiekenap, Boris Warnack, Peter Kramer, Frank Edelmann, Felix Berger, Boris Schmitt   +17 more
wiley   +1 more source

Design, manufacturing and testing of a green non-isocyanate polyurethane prosthetic heart valve.

Biomaterials Science
The sole effective treatment for most patients with heart valve disease is valve replacement by implantation of mechanical or biological prostheses. However, mechanical valves represent high risk of thromboembolism, and biological prostheses are prone to
Sofia F Melo, Alicia Nondonfaz, A. Aqil, A. Pierrard, A. Hulin, C. Delierneux, Bartosz Ditkowski, Maxime Gustin, M. Legrand, B. Tullemans, S. Brouns, A. Nchimi, R. Carrus, Astrid Dejosé, Johan W. M. Heemskerk, Marijke J. E. Kuijpers, Jan Ritter, U. Steinseifer, J. Clauser, Christine Jérôme, Patrizio Lancellotti, C. Oury   +21 more
semanticscholar   +1 more source

The Immune Response in In Situ Tissue Engineering of Aortic Heart Valves

, 2013
The gold standard for treatment of advanced heart valve disease is surgical heart valve re‐ placement. None of the currently available mechanical and bioprosthetic heart valve substi‐ tutes resembles normal heart valve function.
S. Loon, A. Smits, A. Driessen-Mol, F. Baaijens, C. Bouten   +4 more
semanticscholar   +1 more source