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Application of the fourth universal definition of myocardial infarction in clinical practice

Johannes Mair1, Louise Cullen2, Evangelos Giannitsis3

  • 1Department of Internal Medicine III - Cardiology and Angiology, Heart Center, Medical University Innsbruck, Innsbruck, Austria.

Biomarkers : Biochemical Indicators of Exposure, Response, and Susceptibility to Chemicals
|May 5, 2020
PubMed

Insights

The Fourth Universal Definition of Myocardial Infarction (MI) clarifies diagnosis, distinguishing between type 1 MI (plaque rupture) and type 2 MI (supply/demand mismatch). Applying this definition aids in accurate myocardial injury assessment.

Area of Science:

  • Cardiology
  • Pathophysiology
  • Diagnostic Criteria

Background:

  • The Fourth Universal Definition of Myocardial Infarction (MI) redefines diagnostic criteria.
  • Distinguishing between ischaemic and non-ischaemic myocardial injury is crucial.
  • Accurate diagnosis requires evidence of acute myocardial ischaemia alongside acute myocardial injury.

Purpose of the Study:

  • To illustrate the application of the revised Universal Definition of Myocardial Infarction in clinical practice.
  • To provide guidance on differentiating various types of myocardial infarction (MI).
  • To clarify the diagnosis of MI versus acute non-ischaemic myocardial injury.

Main Methods:

  • Case-based review approach.
  • Discussion of real-life clinical cases.
  • Analysis of diagnostic challenges in individual patients.

Main Results:

  • Type 1 MI results from coronary plaque rupture/erosion with thrombus, typically visible on angiography.
  • Type 2 MI diagnosis requires identifying triggers causing myocardial oxygen supply/demand mismatch.
  • Distinguishing MI types and from non-ischaemic injury can be challenging.

Conclusions:

  • Type 1 MI is linked to coronary atherosclerosis complications.
  • Type 2 MI management should target the underlying cause of ischaemia.
  • Accurate application of the new definition is essential for appropriate patient care.

Keywords:
Myocardial infarctioncardiac troponin Icardiac troponin Tdiagnosismyocardial injuryuniversal definition

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