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Triangular Resection to Treat Extensive Anterior Mitral Valve Leaflet Prolapse: Technical Tips
Masaru Sawazaki1, Shinji Mizuta1, Junpei Yamamoto1
1Department of Cardiovascular Surgery, Ichinomiyanishi Hospital, Aichi, Japan.
Annals of Thoracic Surgery Short Reports
|April 24, 2026
Summary
Triangular resection effectively repairs myxomatous anterior mitral prolapse. This technique, using a marking stitch to determine the resection range, offers successful surgical outcomes for mitral valve repair.
Area of Science:
- Cardiovascular Surgery
- Cardiac Surgery
- Mitral Valve Repair
Background:
- Myxomatous degeneration of the anterior mitral leaflet presents treatment challenges, particularly with chordal replacement.
- Triangular resection is an effective method for addressing redundant prolapsed lesions in the mitral valve.
Purpose of the Study:
- To present a novel marking stitch technique for optimizing surgical outcomes in mitral valve repair.
- To evaluate the efficacy of triangular resection for myxomatous extensive anterior mitral leaflet prolapse.
Main Methods:
- A marking stitch was developed to precisely determine the resection range for triangular resection.
- Twenty-four patients with myxomatous extensive anterior leaflet prolapse underwent the procedure between 2004 and 2024.
- A leakage test was performed before triangular resection and annuloplasty ring implantation.
Main Results:
- All 24 patients achieved successful mitral valve repair.
- One patient required re-repair after 8 years due to recurrent mitral regurgitation (Barlow disease).
- The remaining 23 patients experienced no mitral regurgitation greater than mild, with 1-21 year follow-up indicating sustained health.
Conclusions:
- Triangular resection is a highly effective surgical repair for myxomatous extensive anterior mitral prolapse.
- The developed marking stitch technique aids in optimizing the cut range, contributing to successful outcomes.
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