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Post-Myocardial Infarction Heart Failure in Closed-chest Coronary Occlusion/Reperfusion Model in Göttingen Minipigs and Landrace Pigs
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Different patterns of left ventricular enlargement and long-term prognosis after reperfused acute myocardial

Janusz Lipiecki1, Nicolas Durel, Laura Ernande

  • 1Department of Cardiology, Gabriel Montpied University Hospital, Clermont-Ferrand, rue Montalembert, 63003 Clermont-Ferrand, France. jlipiecki@chu-clermontferrand.fr

Archives of Cardiovascular Diseases
|September 30, 2009
PubMed

Insights

Left ventricular remodeling after myocardial infarction (MI) is assessed by volume changes. Enlargement of end-systolic volume (ESV) negatively impacts long-term prognosis, while isolated end-diastolic volume (EDV) enlargement does not.

Area of Science:

  • Cardiology
  • Cardiovascular Research
  • Medical Imaging

Background:

  • Left ventricular remodeling, defined by end-systolic volume (ESV) and end-diastolic volume (EDV) dilation, is a known consequence of acute myocardial infarction (MI).
  • The prognostic implications of distinct patterns of left ventricular volume enlargement following MI remain incompletely understood.
  • Understanding these patterns is crucial for predicting patient outcomes after reperfusion therapy.

Purpose of the Study:

  • To investigate the evolution of left ventricular volumes and contractility parameters post-MI.
  • To correlate these changes with long-term prognosis in patients treated with acute angioplasty.
  • To differentiate the prognostic impact of isolated versus combined ESV and EDV enlargement.

Main Methods:

  • Prospective study of 74 patients successfully treated with angioplasty during acute MI.
  • Left ventricular volumes assessed by contrast ventriculography, defining significant enlargement as >20% increase from acute to 6-month follow-up.
  • Long-term clinical follow-up obtained at a mean of 82 months post-MI.

Main Results:

  • Four patient groups were identified based on volume changes: no enlargement (39%), isolated EDV enlargement (11%), isolated ESV enlargement (14%), and combined ESV/EDV enlargement (36%).
  • Global left ventricular ejection fraction improved in patients without or with isolated EDV enlargement, but decreased in those with isolated ESV or combined enlargement.
  • Six-year event-free survival was significantly better (100%) in patients with no or isolated EDV enlargement compared to those with ESV enlargement (80-78%).

Conclusions:

  • Enlargement of end-systolic volume (ESV) following reperfused acute myocardial infarction is associated with a negative long-term prognosis.
  • Isolated enlargement of end-diastolic volume (EDV) does not appear to adversely affect long-term outcomes.
  • These findings highlight the differential prognostic value of specific left ventricular remodeling patterns after MI.
Abstract

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