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Stentless mitral valve replacement by conventional and minimally invasive techniques
Thomas Walther1, Sven Lehmann, Volkmar Falk
1Universität Leipzig, Herzzentrum, Klinik für Herzchirurgie, Leipzig, Germany.
Surgical Technology International
|March 10, 2006
Summary
Stentless mitral valve replacement using chordally supported devices shows promising early results, maintaining physiological hemodynamics and preserving ejection fraction. Long-term durability of these devices requires further investigation.
Area of Science:
- Cardiovascular Surgery
- Biomedical Engineering
- Heart Valve Disease
Background:
- The physiological mitral valve (MV) plays a crucial role in cardiac function.
- Stentless mitral valve (SMV) replacement aims to preserve native valve functionality.
- Severe mitral valve disease necessitates effective treatment options.
Purpose of the Study:
- To evaluate the outcomes of chordally supported stentless mitral valve (SMV) implantation.
- To assess the hemodynamic performance and functional preservation after SMV replacement.
- To compare surgical approaches for SMV implantation.
Main Methods:
- Retrospective analysis of 51 patients with severe mitral valve disease undergoing SMV replacement since August 1997.
- SMV implantation via conventional sternotomy (32 patients) or minimally invasive lateral minithoracotomy (19 patients).
- Echocardiographic assessment of valve function and ejection fraction postoperatively and at follow-up.
Main Results:
- Perioperative mortality was comparable to conventional mitral valve repair or replacement.
- Echocardiography revealed good SMV function (Vmax 1.7+/-0.2 m/s, Pmean 3.9+/-1.2 mmHg) and preserved ejection fraction.
- Both sternotomy and minithoracotomy approaches maintained annulo-ventricular continuity and physiological hemodynamics.
Conclusions:
- Chordally supported SMV implantation offers physiological hemodynamics and preserves cardiac function.
- Surgical approaches, including minimally invasive techniques, are feasible for SMV implantation.
- Long-term durability of stentless mitral valves remains an area for future research.