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Related Experiment Videos

Long-term experience with mitral valve replacement: an evolving strategy for prosthesis selection.

L P Enright, R L Mitchell, B G Wilbur

    American Heart Journal
    |June 1, 1985
    PubMed
    Summary
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    For mitral valve replacement (MVR), hospital mortality is low and unaffected by valve type. However, late survival depends on valve choice and coronary artery disease, necessitating individualized prosthesis selection.

    Area of Science:

    • Cardiovascular Surgery
    • Biomaterials Science
    • Clinical Outcomes Research

    Background:

    • Mitral valve replacement (MVR) is a critical procedure for managing mitral valve disease.
    • The choice of prosthetic valve (mechanical vs. tissue) significantly impacts long-term patient outcomes.
    • Coronary artery pathology is a known comorbidity affecting cardiac surgery prognosis.

    Purpose of the Study:

    • To evaluate hospital and late mortality after MVR.
    • To compare the long-term survival rates between different prosthetic valve types (Starr-Edward 6120 vs. MPX).
    • To assess the influence of coronary artery pathology on MVR outcomes.

    Main Methods:

    • Retrospective analysis of 188 consecutive MVR operations over 12.5 years in 181 patients.

    Related Experiment Videos

  • Comparison of survival data based on prosthetic valve type and presence of coronary artery disease.
  • Actuarial analysis to determine tissue valve failure incidence over time.

    • Main Results:

    • Hospital mortality for MVR without aortic valve disease was 4.5% (7/156), independent of valve type or coronary pathology.
    • Late cardiac mortality was higher with Starr-Edward 6120 prostheses compared to MPX in isolated MVR.
    • Coronary artery pathology was associated with the poorest late survival; MPX tissue durability showed increased failure incidence after 5 years.

    Conclusions:

    • No single prosthetic valve is ideal for all MVR patients.
    • Prosthetic valve selection for MVR requires careful consideration of patient-specific factors like age, prior surgeries, illness severity, and re-operation feasibility.
    • While MPX is preferred, limited tissue durability necessitates judicious use of mechanical prostheses in specific patient subgroups.