Related Experiment Videos
Porcine mitral stentless valve mid-term clinical results
M Vrandecic1, B Gontijo, F A Fantini
1Department of Cardio-Thoracic Surgery, Biocor Institute, Belo Horizonte, MG, Brazil.
Summary
This study evaluated the long-term results of the mitral stentless valve, finding it preserves left ventricular function. Experience shows it can significantly increase ejection fraction in patients with poor cardiac function.
Area of Science:
- Cardiovascular Surgery
- Biomaterials Science
Background:
- The mitral stentless valve represents a novel approach in valvular procedures.
- Preservation of annulo-ventricular continuity is a key concept in its design.
Purpose of the Study:
- To evaluate the 4-year outcomes of the mitral stentless valve.
- To assess the impact of preserving annulo-ventricular continuity on long-term results.
Main Methods:
- 120 patients underwent mitral valve replacement using a porcine stentless valve between March 1992 and August 1996.
- Follow-up averaged 28.5 months, with a total of 3424 months observed.
- The study population predominantly had rheumatic heart disease and were in NYHA functional class III/IV.
Main Results:
- Hospital mortality was 5.83%, with most deaths unrelated to the valve itself.
- Early reoperations for technical failure occurred in 4 patients without mortality.
- Late reoperations were needed in 16 patients, primarily for mitral insufficiency or endocarditis; however, 72 out of 82 patients showed a competent valve post-procedure.
Conclusions:
- Technical complexity remains a challenge, necessitating reoperations in some cases.
- The mitral stentless valve demonstrates preservation of left ventricular function.
- Significant increases in ejection fraction were observed in patients with pre-existing left ventricular dysfunction.