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Mitral valve surgery

Mitral valve surgery has been studied in 5 papers since 2021: 5 observational studies in people. The newest paper, Sep 22, 2025: “Trends and Late Outcomes in Elderly Patients Undergoing Mitral Valve Interventions in the United States”.

Exposure

5 papers study it2 findingsUpdated

See all 5

“MV intervention (HR 0.45, 95% CI 0.25 to 0.83, p = 0.011) and angiotensin converting enzyme inhibitor/angiotensin receptor blocker use (HR 0.39, 95% CI 0.20 to 0.79, p = 0.009) were associated with an improved prognosis”
Impact of Frailty and Mitral Valve Surgery on Outcomes of Severe Mitral Stenosis Due to Mitral Annular CalcificationThe American journal of cardiology2021doi:10.1016/j.amjcard.2021.08.036

None of its findings points the other way.

C, W, M, H: cells, worms or flies, mice, humans. Dark: independent labs found the same change there. Light: one lab or one study. Outline: nothing yet.

Labs are independent when their papers share no last author and no institution.

Company ties: findings with an author at a company, or from a paper whose competing-interests statement declares ties to one.

  • 2 independent labs in 2 countries
  • 1 of 2 findings with company ties
  • Humans5

What did studies of Mitral valve surgery find?

1

Studies of Mitral valve surgery measured 1 outcome; the most studied are secondary mitral regurgitation (1 study).

Secondary mitral regurgitation

downin humans1

1 study

  1. Mitral valve surgery is linked with lower secondary mitral regurgitation in humans (secondary mitral regurgitation with poor left ventricular ejection fraction <=30%) (p<0.001).

    “Postoperative echocardiograms showed significantly improved mitral regurgitation, from moderate to severe to less than trivial (p<0.001)”

    Humanssecondary mitral regurgitation with poor left ventricular ejection fraction <=30%58 malessn = 69

    Results of mitral valve surgery for secondary regurgitation with poor left ventricular function

    Preprint

More on Secondary mitral regurgitation

What is Mitral valve surgery linked with?

1

Studies link Mitral valve surgery with 1 measure, most often mortality (1 study).

Mortality

downin humans1HR 0.45

1 study

  1. Mitral valve surgery is linked with a lower risk of mortality in humans (severe mitral stenosis resulting from mitral annular calcification) (HR 0.45, 95% CI 0.25 to 0.83, p = 0.011).

    “MV intervention (HR 0.45, 95% CI 0.25 to 0.83, p = 0.011) and angiotensin converting enzyme inhibitor/angiotensin receptor blocker use (HR 0.39, 95% CI 0.20 to 0.79, p = 0.009) were associated with an improved prognosis”

    Humanssevere mitral stenosis resulting from mitral annular calcificationmedian follow-up of 360 daysn = 283

    Impact of Frailty and Mitral Valve Surgery on Outcomes of Severe Mitral Stenosis Due to Mitral Annular Calcification

    The American journal of cardiology

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