Results 1 to 10 of about 12,637 (283)
A chronological history of heart valve prostheses to offer perspectives of their limitations. [PDF]
Front Bioeng BiotechnolProsthetic heart valves (PHV) have been studied for around 70 years. They are the best alternative to save the life of patients with cardiac valve diseases. However, current PHVs may still cause significant disadvantages to patients.
Evangelista RAA, Pires ALR, Nogueira BV.
europepmc +5 more sources
Evaluation of the marker of hypercoagulability prothrombin fragment F 1+2 in patients with mechanical or biological heart valve prostheses [PDF]
Arquivos Brasileiros de Cardiologia, 2002 OBJECTIVE: To investigate whether patients with heart valve prostheses and similar International Normalized Ratios (INR) have the same level of protection against thromboembolic events, that is, whether the anticoagulation intensity is related to the ...
Claudia Natália Ferreira +6 more
doaj +2 more sources
Polyurethane: material for the next generation of heart valve prostheses? [PDF]
European Journal of Cardio-Thoracic Surgery, 2000 The prospects for a durable, athrombogenic, synthetic, flexible leaflet heart valve are enhanced by the recent availability of novel, biostable polyurethanes. As a forerunner to evaluation of such biostable valves, a prototype trileaflet polyurethane valve (utilising conventional material of known in vitro behaviour) was compared with mechanical and ...
D.J. Wheatley
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The concept of automated functional design of heart valve prostheses
Complex Issues of Cardiovascular Diseases, 2021 Aim. To develop an algorithm for the automated functional design of the heart valve leaflet apparatus.Methods. The geometry of the aortic valve leaflet was designed in the Matlab programming environment (MathWorks, Massachusetts, USA). Numerical modeling of the opening process was performed using Abaqus/CAE (Dassault Systemes, France).Results.
P. S. Onishchenko +3 more
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POLYMERIC HEART VALVE PROSTHESES: CONDITION AND PERSPECTIVES
Russian Journal of Transplantology and Artificial Organs, 2018 The idea of creating a polymer heart valve, which has high strength and biocompatibility, occurs in the 60’s. Since then, many polymer compounds have been investigated, but no solution has been found for this problem. In recent years, in connection with the development of technologies for the synthesis of high-molecular compounds, new polymers have ...
М. А. Резвова +1 more
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Annular injuries following the insertion of heart valve prostheses [PDF]
Thorax, 1974 Bowes, V. F., Datta, B. N., Silver, M. D. and Minielly, J. A. (1974). Thorax , 29 , 530-533. Annular injuries following the insertion of heart valve prostheses. The clinical presentation and morphological findings in eight cases of annular injury associated with the insertion of prosthetic heart valves are discussed.
V. F. Bowes +3 more
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Heart Valve Prostheses in Pregnancy: Outcomes for Women and Their Infants [PDF]
Journal of the American Heart Association, 2014 Background As the prognosis of women with prosthetic heart valves improves, and increasing number are contemplating and undertaking pregnancy. Accurate knowledge of perinatal outcomes is essential, assisting counseling and guiding care.
Lawley, Claire M +5 more
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The Closing Behavior of Mechanical Aortic Heart Valve Prostheses
ASAIO Journal, 2004 Mechanical artificial heart valves rely on reverse flow to close their leaflets. This mechanism creates regurgitation and water hammer effects that may form cavitations, damage blood cells, and cause thromboembolism. This study analyzes closing mechanisms of monoleaflet (Medtronic Hall 27), bileaflet (Carbo-Medics 27; St. Jude Medical 27; Duromedics 29)
Po‐Chien Lu +5 more
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Hemodynamic Evaluation of Heart Valve Prostheses
Journal of the American College of Cardiology, 2009 The treatment of aortic valve disease is undergoing rapid changes. In addition to conventional valve replacement that has evolved as the gold standard over several decades, transcatheter techniques have been introduced into clinical practice.
Thomas Walther, Volkmar Falk
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Fifteen years of experience with ATS mechanical heart valve prostheses [PDF]
The Journal of Thoracic and Cardiovascular Surgery, 2009 ATS Medical, Inc, developed a mechanical heart valve that has been in use since 1992. In this article, we present the results of 15 years of follow-up of patients who have undergone ATS heart valve replacement at our hospital.We performed ATS heart valve replacements on 231 patients between September 1993 and March 2008.
Akira Sezai +6 more
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