The purpose of this study was to report our experience with 120 prosthetic valves implanted in 105 patients over an 8-year period. Their preoperative status was compared at an average follow-up period of 4 years (range 1 to 6 years) with the postoperative results. We conclude that the Mexican-made valves (Biomed) meet the highest international quality standards: they are well tolerated by the patients; their performance is excellent and no postoperative dysfunction of the valves was ever detected. The few complications observed were no different from those reported for foreign ball-caged valves. Finally, most of our patients showed a marked improvement postoperatively.
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Fluid mechanics of heart valves.
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Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0535, USA.
Valvular heart disease is a life-threatening disease that afflicts millions of people worldwide and leads to approximately 250,000 valve repairs and/or replacements each year. Malfunction of a native valve impairs its efficient fluid mechanic/hemodynamic performance. Artificial heart valves have been used since 1960 to replace diseased native valves and have saved millions of lives.
View Article and Find Full Text PDFThe Biomed caged-ball cardiac valve prosthesis. A study of 120 implants.
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Departamento de Cirugía Cardiovascular, Hospital Ignacio Morones Prieto, San Luis Potosí, México.
The purpose of this study was to report our experience with 120 prosthetic valves implanted in 105 patients over an 8-year period. Their preoperative status was compared at an average follow-up period of 4 years (range 1 to 6 years) with the postoperative results. We conclude that the Mexican-made valves (Biomed) meet the highest international quality standards: they are well tolerated by the patients; their performance is excellent and no postoperative dysfunction of the valves was ever detected.
View Article and Find Full Text PDF[Flow characteristics in 3 kinds of heart valve prosthesis].
Arch Invest Med (Mex)
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Instituto Nacional de Pediatría, Universidad Autónoma Metropolitana, (Iztapalapa).
Transvalvular turbulence caused by the blood flow in implanted cardiac valvular prosthesis is the cause of thrombosis at the post-valvular region. The literature in this connection indicates that thromboembolic complications are more common with the tilting disc mechanical valves. In order to study the turbulence caused by porcine biological prosthetic valves, by a caged-ball Biomed mechanical valve and by a tilting disc Björk-Shiley valve, a device was developed which permits to visualize and to photograph flow characteristics in the three types of valves with the purpose of determining the degree of turbulence generated in each case.
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