Results 1 to 10 of about 115,388 (336)

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.
Walther, T, Falk, V
semanticscholar   +6 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 ...
David J. Wheatley, L Raco, I Sim, G M Bernacca, Philip R. Belcher, J S Boyd   +5 more
openaire   +4 more sources

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 ...
M. A. Rezvova, E. A. Ovcharenko
openaire   +5 more sources

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.
John A. Minielly, Vernon F. Bowes, Malcolm D. Silver, Bhoopendra N. Datta   +3 more
openaire   +5 more sources

The concept of automated functional design of heart valve prostheses

Complex Issues of Cardiovascular Diseases, 2020
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, K. Yu. Klyshnikov, M. A. Rezvova, E. A. Ovcharenko   +3 more
openaire   +4 more sources

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, Algert, Charles S, Ford, Jane B, Nippita, Tanya A, Figtree, Gemma A, Roberts, Christine L.   +5 more
  +10 more sources

Fifteen years of experience with ATS mechanical heart valve prostheses [PDF]

The Journal of Thoracic and Cardiovascular Surgery, 2010
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.
Tetsuya Niino, Akira Sezai, Mitsumasa Hata, Kazutomo Minami, Atsushi Hirayama, Isamu Yoshitake, Yuji Kasamaki   +6 more
openaire   +3 more sources

Echocardiographic assessment of heart valve prostheses

Journal of Cardiovascular Echography, 2014
Patients submitted to valve replacement with mechanical or biological prosthesis, may present symptoms related either to valvular malfunction or ventricular dysfunction from other causes. Because a clinical examination is not sufficient to evaluate a prosthetic valve, several diagnostic methods have been proposed to assess the functional status of a ...
Luigi Ascione, Pasquale Coppolino, Chiara Sordelli, Pio Caso, Sergio Severino   +4 more
openaire   +4 more sources

Anticoagulation in pregnant women with mechanical heart valve prostheses [PDF]

Heart, 1999
To evaluate the outcome of pregnancy in women with mechanical heart valve prostheses in relation to the anticoagulant treatment used in the first trimester and the incidence of thrombotic and bleeding complications.92 pregnancies in 59 women were followed between 1986 and 1997. In 31 pregnancies, oral anticoagulants were discontinued when pregnancy was
M. A. Lazzari, M. T. Santarelli, C. G. Fondevila, Susana S. Meschengieser   +3 more
openaire   +3 more sources

In vitro comparison of aortic heart valve prostheses

The Journal of Thoracic and Cardiovascular Surgery, 1988
The hydrodynamic performance of a series of mechanical heart valve prostheses is measured in the aortic position. All experiments are performed in an electrohydraulic, computer-controlled pulse duplicator simulating the left side of the human circulatory system.
Helmut Reul, Ulrich Steinseifer, Martin Knoch, Erwin Knott, Günter Rau   +4 more
openaire   +3 more sources