Results 191 to 200 of about 121,770 (258)

Metal Wear in Lillehei‐Kaster Heart Valve Prostheses

Artificial Organs, 1985
Abstract: Ten Lillehei‐Kaster heart valve prostheses, in situ for up to 10 years and recovered at surgery or necropsy, were examined by light and scanning electron microscopy. All showed metal wear on the luminal aspect of their struts. The volume of wear related to the duration a prosthesis had been in situ. The worn metal showed distinct, transverse
M D, Silver, H, Koppenhoefer, H A, Heggtveit, T H, Reif   +3 more
openaire   +2 more sources

Mechanical heart valve prostheses: sound level and related complaints

European Journal of Cardio-Thoracic Surgery, 1992
In a randomised study, we investigated the sound production of mechanical heart valve prostheses and the complaints related to this sound. The CarboMedics, Björk-Shiley monostrut and StJude Medical prostheses were compared. A-weighted levels of the pulse-like sound produced by the prosthesis were measured in 25 patients after aortic valve replacement ...
LAURENS, RRP, WIT, HP, EBELS, T
openaire   +3 more sources

Next-generation tissue-engineered heart valves with repair, remodelling and regeneration capacity

Nature Reviews Cardiology, 2020
E. Fioretta, Sarah E Motta, Valentina Lintas, S. Loerakker, K. Parker, F. Baaijens, V. Falk, S. Hoerstrup, M. Emmert   +8 more
semanticscholar   +1 more source

[Thrombosed mechanical heart valve prostheses].

Kyobu geka. The Japanese journal of thoracic surgery, 2004
Our clinical experiences of treatment for definite or probable thrombosed mechanical valve prostheses was presented and discussed concerning with surgical indication, several operative approaches to a target valve and detail surgical techniques.
openaire   +1 more source

[Glutaraldehyde residues in heart valve prostheses].

Archiv der Pharmazie, 1991
Bioprosthetic heart valves prepared from glutaraldehyde-pretreated bovine pericardium are used to replace diseased human cardiac valves. Mineralisation in the course of time and toxic effects are possibly caused by glutaraldehyde residues. Different washing methods carried out before transplantation are compared with regard to the different ability of ...
H, Spreitzer, W, Jäger, M, Grimm, E, Eybl, M, Müller   +4 more
openaire   +1 more source

Effect of heart rate on the hemodynamics of bileaflet mechanical heart valves’ prostheses (St. Jude Medical) in the aortic position and in the opening phase: A computational study

Proceedings of the Institution of mechanical engineers. Part H, journal of engineering in medicine, 2016
Mehdi Jahandardoost, G. Fradet, H. Mohammadi   +2 more
semanticscholar   +1 more source

[Hemodynamics of various heart valve prostheses].

Schweizerische medizinische Wochenschrift, 1992
Modern tilting disc and bileaflet prostheses, and bio-prostheses, perform similarly regarding pressure gradients, discharge coefficient and performance index; however, only bio-prostheses increase their opening area with increasing flow. Ball valve prostheses of the Starr-Edwards type perform less satisfactorily with higher pressure gradients and lower
D, Burckhardt, P, Weiss, M, Peter, A, Hoffmann   +3 more
openaire   +1 more source

Dynamics of mechanical heart valve prostheses

1995
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

[Antibiotic pretreatment of heart valve prostheses].

Minerva cardioangiologica, 1992
Bacterial endocarditis on cardiac valvular prosthesis is still a frequent and dangerous complication: septicemia, embolism, valvular dysfunction and mortality. To prevent these complications, intraoperative treatment of prosthesis, by immersion in antibiotic solution, was performed in 1262 patients.
A, Actis Dato, C, Chiusolo, G C, Cicchitti, G M, Actis Dato, M C, Porro, A, Bello   +5 more
openaire   +1 more source

MATERIALS AND HEART VALVE PROSTHESES

Annals of the New York Academy of Sciences, 1968
W R, Pierie, W D, Hancock, S, Koorajian, A, Starr   +3 more
openaire   +2 more sources