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Published on: December 11, 2017
Mitral mechanical valve without long-term anticoagulation. Eight-year follow-up
Scandinavian Journal of Thoracic and Cardiovascular Surgery
|January 1, 1994
Summary
Microporous-surfaced valves in mitral replacement patients showed no thromboembolic complications without long-term anticoagulation. This approach allowed successful pregnancies and favorable long-term outcomes in selected patients.
Area of Science:
- Cardiovascular Surgery
- Biomaterials Science
- Clinical Medicine
Background:
- Mechanical heart valve replacement is a common procedure.
- Thromboembolic complications and the need for long-term anticoagulation are significant concerns.
- Microporous surfaces offer potential for improved biocompatibility and reduced thrombogenicity.
Purpose of the Study:
- To evaluate the safety and efficacy of microporous-surfaced valves in mitral valve replacement.
- To assess the necessity of long-term anticoagulation in patients receiving these valves.
- To investigate outcomes including pregnancy and thromboembolic events.
Main Methods:
- Mitral valve replacement using microporous-surfaced valves (similar to Björk-Shiley Monostrut) in 12 patients.
- No long-term anticoagulant therapy administered after initial 3-month period for endothelialization.
- Follow-up period of 6-8 years, including monitoring for thromboembolic events and pregnancy outcomes.
Main Results:
- No thromboembolic complications observed in the 12 mitral valve replacement patients treated without long-term anticoagulation.
- Four women successfully delivered seven children during the follow-up period.
- In contrast, patients with aortic valve replacement or combined procedures experienced some thromboembolic events, with varying outcomes.
Conclusions:
- Microporous-surfaced mitral valves may allow for the discontinuation of long-term anticoagulation.
- This strategy appears safe and effective, even enabling successful pregnancies.
- Further research is warranted to confirm these findings in larger cohorts and different valve types.
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