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Coronary microembolization: from bedside to bench and back to bedside.

Gerd Heusch1, Petra Kleinbongard, Dirk Böse

  • 1Institut für Pathophysiologie, Universitätsklinikum Essen, Essen, Germany. gerd.heusch@uk-essen.de

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Coronary microembolization, often from plaque rupture, causes heart damage. Treatments like statins and aspiration devices can mitigate these effects, improving outcomes in acute myocardial infarction.

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Area of Science:

  • Cardiology
  • Vascular Biology

Background:

  • Coronary microembolization, caused by plaque erosion/rupture, is linked to acute coronary syndromes and percutaneous coronary interventions.
  • Consequences include microinfarcts, inflammation, contractile dysfunction, and reduced coronary reserve.

Purpose of the Study:

  • To review the mechanisms, consequences, detection, and prevention strategies for coronary microembolization.

Main Methods:

  • Literature review of spontaneous and iatrogenic coronary microembolization.
  • Discussion of diagnostic tools like intracoronary Doppler and late-enhancement nuclear magnetic resonance.
  • Analysis of protective pharmacological and device-based interventions.

Main Results:

  • Microemboli can be visualized via intracoronary Doppler, and microinfarcts by MRI.
  • Statins, antiplatelet agents, and vasodilators offer protection when administered pre-intervention.
  • Distal protection devices show limited clinical benefit, except in saphenous vein grafts.

Conclusions:

  • Aspiration devices effectively reduce thrombus burden and improve perfusion in acute myocardial infarction.
  • Pharmacological and interventional strategies are crucial for managing coronary microembolization and its sequelae.