Results 271 to 280 of about 107,940 (326)

Outcomes after implantation of right-sided mechanical valve prostheses in congenital heart disease

Heart, 2023
Background Bioprosthetic valves are often used for pulmonary valve replacement (PVR) and tricuspid valve replacement (TVR) because of concerns about mechanical valve thrombosis in the right heart.
Omar Abozied, William R. Miranda, Ahmed Younis, L. Burchill, C. Jain, H. Connolly, J. Dearani, Elizabeth H. Stephens, A. Egbe   +8 more
semanticscholar   +1 more source

Alloplastic materials for heart-valve prostheses [PDF]

Medical & Biological Engineering & Computing, 1980
Alloplastic materials have found wide application in heart-valve prostheses, in spite of the need for permanent anticoagulant treatment. Though biological valves exhibit excellent thromboresistance, they fail in long-term application because of a disintegration of the tissue structure.
Max Schaldach, P. Baurschmidt
openaire   +2 more sources

Tissue engineered heart valves for transcatheter aortic valve implantation: current state, challenges, and future developments

Expert Review of Cardiovascular Therapy, 2020
Introduction The establishment of transcatheter aortic valve implantation (TAVI) has revolutionized the treatment of severe aortic stenosis. However, with TAVI being approved for low-risk patients, valve durability is becoming of central importance. Here,
N. Poulis, P. Zaytseva, Eric K. N. Gähwiler, Sarah E Motta, E. Fioretta, N. Cesarovic, V. Falk, S. Hoerstrup, M. Emmert   +8 more
semanticscholar   +1 more source

Mechanical heart valve prostheses

Cardiovascular Pathology, 2003
Mechanical heart value prostheses have been in use since the 1950s. Many prostheses have been used for a while and then discontinued. Today, there are a large number and variety of prostheses in use and an even larger variety that are in place in patients. These may be explanted at any time for a number of reasons.
Cristina Fayet, Roberto J. Cusimano, Roberto J. Cusimano, Charis Kepron, Patrick H. Blit, Manmeet Ahluwalia, Craig A. Munroe, Richard L. Leask, Christina Ahn, Jagdish Butany   +9 more
openaire   +3 more sources

dynamics of mechanical heart valve prostheses [PDF]

WIT Transactions on Biomedicine and Health, 1970
A numerical code for analyzing the dynamic behaviour of heart valve prostheses is presented. The study is conducted with the valve in a simplified cardiovascular system, represented schematically by a circuit with a pump, the valve under test, a rugged elastic tube and a capacity.
BELFORTE, GUIDO, RAPARELLI, TERENZIANO, EULA, Gabriella   +2 more
openaire   +1 more source

Thromboembolic complications of heart valve prostheses

American Heart Journal, 1971
Abstract One hundred seventy patients with prosthetic heart valves receiving anticoagulant therapy have been followed at one to four week intervals for three to sixty-eight months (mean: 26 months). The overall incidence of late emboli was 16 per cent.
Pierre Grondin, Nicolas Aerichide, Lucien Campeau, Beat Friedli   +3 more
openaire   +3 more sources

Tissue-Engineered Heart Valve Prostheses: ‘State of the Heart‘

Regenerative Medicine, 2008
In this article, we will review the current state of the art in heart valve tissue engineering. We provide an overview of mechanical and biological replacement options, outlining advantages and limitations of each option. Tissue engineering, as a field, is introduced, and specific aspects of valve tissue engineering are discussed (e.g., biomaterials ...
Francesco Migneco, Ravi K. Birla, Scott J. Hollister   +2 more
openaire   +3 more sources

Pitfalls in statistical analysis of heart valve prostheses

The Annals of Thoracic Surgery, 1989
Beware of the dangers of automated analysis, especially in multiple regression, and of overinterpretation of data. Do not let yourself be manipulated by numbers.
Albert Starr, Gary L. Grunkemeier
openaire   +3 more sources

Pulsatile flow experiments on heart valve prostheses

Medical & Biological Engineering & Computing, 1983
In vitro fluid dynamic characteristics of aortic valve prostheses were experimentally measured for physiological relevant pulsatile flows using hot-film velocimetry. The prostheses studied were (i) centrally occluding ball-in-cage and (ii) tilting disc valves. The valves sewn to a plexiglass ring were placed in a specially designed valve chamber.
Herman L. Falsetti, Ching-Jen Chen, T. L. Yearwood, Krishnan B. Chandran   +3 more
openaire   +3 more sources