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Cardiac valvular replacement devices: residual problems and innovative investigative technologies
W R Jamieson1, S V Lichtenstein
1University Heart Centre, St. Paul s Hospital, Vancouver Hospital and Health Sciences Centre, Vancouver, Canada.
Surgical Technology International
|May 2, 2003
Summary
Despite advancements, cardiac valve replacement devices still face issues like thromboembolism and structural failure. New technologies aim to improve the performance of both biological and mechanical prostheses.
Area of Science:
- Cardiovascular Surgery
- Biomedical Engineering
- Materials Science
Background:
- Cardiac valvular replacement devices have seen significant advancements over 25 years.
- Despite developments, biological and mechanical prostheses have residual complications.
- Complications include thromboembolism, hemorrhage, and structural failure, alongside suboptimal hemodynamic performance.
Purpose of the Study:
- To review the persistent challenges with current biological and mechanical cardiac valve prostheses.
- To highlight ongoing issues such as leaflet degeneration, calcification, thrombus formation, and thromboembolic phenomena.
- To discuss the potential of innovative technologies to enhance clinical performance.
Main Methods:
- Literature review of advancements in cardiac valvular replacement devices over the past 25 years.
- Analysis of residual problems associated with biological (porcine, pericardial) and mechanical prostheses.
- Examination of ongoing research and innovative technologies under investigation.
Main Results:
- Biological prostheses exhibit persistent structural failure, including leaflet degeneration and dystrophic calcification.
- Mechanical prostheses continue to pose risks of thrombus formation and thromboembolic events, even with anticoagulation.
- Hemodynamic performance optimization remains a challenge for both types of prostheses.
Conclusions:
- Residual problems persist with both biological and mechanical cardiac valve replacements.
- Innovative technologies are under investigation and are expected to significantly improve clinical outcomes.
- Further research is needed to fully address and overcome the limitations of current prosthetic valves.