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Ischemic mitral regurgitation and risk of heart failure after myocardial infarction

Doron Aronson1, Noa Goldsher, Robert Zukermann

  • 1Department of Cardiology, Rambam Medical Center and Rappaport Medical School, Haifa, Israel. daronson@tx.technion.ac.il

Archives of Internal Medicine
|November 30, 2006
PubMed
Abstract

Insights

Even mild ischemic mitral regurgitation (MR) increases heart failure risk after myocardial infarction. The severity of MR is independently associated with developing heart failure (HF) long-term.

Area of Science:

  • Cardiology
  • Cardiovascular Research
  • Heart Failure Research

Background:

  • Ischemic mitral regurgitation (MR) after myocardial infarction can worsen left ventricular remodeling and promote heart failure (HF).
  • Limited data exist on the long-term impact of ischemic MR on HF risk following myocardial infarction.

Purpose of the Study:

  • To investigate the association between the severity of ischemic MR and the long-term risk of developing HF after acute myocardial infarction.
  • To determine if even mild MR poses a significant risk for HF development.

Main Methods:

  • A prospective study of 1190 patients admitted for acute myocardial infarction.
  • Mitral regurgitation assessed by echocardiography, categorized as mild, moderate, or severe based on regurgitant jet area.
  • Follow-up duration averaged 24 months to assess HF development and mortality.

Main Results:

  • Mild and moderate/severe ischemic MR were present in 39.7% and 6.3% of patients, respectively.
  • Adjusted hazard ratios for HF were 2.8 for mild MR and 3.6 for moderate/severe MR, compared to no MR.
  • Adjusted hazard ratios for death were 1.2 for mild MR and 2.0 for moderate/severe MR.

Conclusions:

  • A graded, independent association exists between ischemic MR severity and HF development post-myocardial infarction.
  • Even mild ischemic MR is linked to an increased risk of heart failure.
  • These findings highlight the importance of assessing and managing ischemic MR in post-MI patients.

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