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Impact of mitral intervention on outcomes of patients with mitral valve dysfunction and annulus calcification

Nahoko Kato1, Patricia A Pellikka1, Christopher G Scott2

  • 1Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA.

Catheterization and Cardiovascular Interventions : Official Journal of the Society for Cardiac Angiography & Interventions
|January 23, 2022
PubMed

Insights

Mitral intervention for severe mitral valve dysfunction in patients with mitral annulus calcification significantly reduces all-cause mortality. Early intervention improves survival rates in this high-risk population.

Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Echocardiography

Background:

  • Mitral annulus calcification (MAC) presents significant surgical risks due to patient age, comorbidities, and calcification challenges.
  • The clinical impact of mitral intervention in patients with MAC and severe mitral valve dysfunction (MVD) remains unclear.

Purpose of the Study:

  • To compare all-cause mortality between patients with MAC and severe MVD who underwent mitral intervention versus those who did not.
  • To evaluate the effectiveness of early mitral intervention in this patient cohort.

Main Methods:

  • Retrospective analysis of 357 patients with MAC and severe MVD identified via transthoracic echocardiography.
  • Stratification into two groups: early mitral intervention (<1 year post-TTE) versus no or later intervention.
  • Primary endpoint was all-cause mortality, with survival analysis and adjusted hazard ratios.

Main Results:

  • 108 patients underwent early mitral intervention; they were younger and had fewer comorbidities than the no-intervention group.
  • The intervention group demonstrated significantly higher estimated survival rates at 1 and 4 years (80% vs. 72% and 55% vs. 35%, respectively).
  • Mitral intervention was an independent predictor of lower mortality (HR=0.66, p=0.046) after adjusting for key clinical factors.

Conclusions:

  • Early mitral intervention in patients with MAC and severe MVD is associated with reduced all-cause mortality.
  • Mitral intervention is an independent protective factor against mortality in this high-risk population.
Abstract

Keywords:
echocardiographymitral annulus calcificationmitral regurgitationmitral repairmitral replacementmitral stenosistranscatheter mitral intervention

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