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Intramyocardial haemorrhage after acute myocardial infarction

Ryanne P Betgem1, Guus A de Waard1, Robin Nijveldt1

  • 1Department of Cardiology, Institute for Cardiovascular Research, VU University Medical Center, De Boelelaan 1117, 1081 HV Amsterdam, Netherlands.

Nature Reviews. Cardiology
|November 19, 2014
PubMed

Insights

Acute myocardial infarction (AMI) treatment with percutaneous coronary intervention (PCI) can lead to cardiac failure due to the no-reflow phenomenon. Intramyocardial hemorrhage is a key factor in this process, impacting treatment strategies.

Area of Science:

  • Cardiology
  • Pathophysiology
  • Translational Medicine

Background:

  • Percutaneous coronary intervention (PCI) is standard for acute myocardial infarction (AMI), reducing mortality.
  • A significant number of AMI patients develop chronic heart failure post-PCI.
  • This failure is linked to the 'no-reflow' phenomenon, characterized by poor microvascular function and myocardial perfusion despite patent epicardial arteries.

Purpose of the Study:

  • To review the pathogenesis and clinical significance of intramyocardial hemorrhage (IMH) in AMI.
  • To explore the role of IMH in the no-reflow phenomenon and myocardial injury.
  • To discuss current diagnostic methods and future therapeutic targets for IMH in AMI.

Main Methods:

  • Comprehensive literature review.
  • Analysis of pathological and clinical observations.
  • Synthesis of current understanding of no-reflow and intramyocardial hemorrhage.

Main Results:

  • No-reflow is now understood to involve not only microvascular obstruction but also irreversible microvascular injury and intramyocardial hemorrhage.
  • Intramyocardial hemorrhage shares pathophysiological similarities with hemorrhagic transformation post-ischemic stroke.
  • Understanding IMH is critical for developing novel therapeutic strategies for AMI.

Conclusions:

  • Intramyocardial hemorrhage is a significant contributor to poor outcomes in acute myocardial infarction patients treated with PCI.
  • Further research into the mechanisms and clinical implications of IMH is essential.
  • Targeting IMH holds promise for improving therapeutic efficacy and patient prognosis in AMI.

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