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Microcirculatory dysfunction in ST-elevation myocardial infarction: cause, consequence, or both?

Amir Lerman1, David R Holmes, Joerg Herrmann

  • 1Division of Cardiovascular Disease, Department of Internal Medicine, Mayo Clinic and College of Medicine, 200 First Street SW, Rochester, MN 55902, USA. lerman.amir@mayo.edu

European Heart Journal
|March 10, 2007
PubMed

Insights

Microcirculatory dysfunction impacts ST-elevation myocardial infarction outcomes. This review explores its role as a cause or consequence, influencing patient management in acute coronary syndromes.

Area of Science:

  • Cardiology
  • Vascular Biology
  • Clinical Medicine

Background:

  • ST-elevation myocardial infarction (STEMI) treatment aims for myocardial reperfusion, yet success rates remain suboptimal.
  • Normal reperfusion is not achieved in about half of STEMI patients, highlighting unmet clinical needs.
  • The coronary microcirculation's role in STEMI pathophysiology and outcomes is increasingly recognized.

Purpose of the Study:

  • To review the critical role of coronary microcirculation in the development and clinical outcomes of STEMI.
  • To synthesize current understanding of microcirculatory dysfunction in acute coronary syndromes.
  • To discuss the implications of microcirculatory dysfunction for patient management strategies.

Main Methods:

  • A comprehensive literature search was conducted using PubMed/Medline.
  • Key search terms included: acute coronary syndrome, acute myocardial infarction, coronary artery disease, endothelial dysfunction, microcirculation, and reperfusion.
  • Information synthesis focused on understanding the dual theories of microcirculatory dysfunction in STEMI.

Main Results:

  • Evidence suggests myocardial microcirculatory dysfunction can be a consequence of primary epicardial events (vulnerable plaque concept).
  • Alternatively, microcirculatory dysfunction may contribute to the acute coronary event's course (vulnerable patient concept).
  • The study discusses the merits of both viewpoints and their impact on clinical decision-making.

Conclusions:

  • Microcirculatory dysfunction in STEMI can be viewed as a cause, a consequence, or a combination of both.
  • Understanding these mechanisms is crucial for refining treatment strategies in acute myocardial infarction.
  • This review underscores the complexity of microcirculatory involvement in STEMI, bridging traditional and non-traditional concepts.
Abstract

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