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June 6, 2026Journal of the American College of Cardiology125 citations

Effect of Definition on Incidence and Prognosis of Type 2 Myocardial Infarction

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TNThomas NestelbergerJBJasper BoeddinghausPBPatrick Badertscher

Key Result

Two different definitions of type 2 myocardial infarction were evaluated for their effect on incidence and prognosis in 4,015 consecutive patients presenting with symptoms suggestive of MI.

Key Points

  • This research aims to evaluate how the definition of type 2 myocardial infarction affects its incidence and patient outcomes.
  • Data collected from multiple medical centers, focusing on varying definitions of myocardial infarction.
  • Analysis of incidence rates over specific time periods and examination of patient outcomes related to these definitions.
  • Redefinition of type 2 myocardial infarction resulted in a 20% increase in reported cases, with significant prognostic implications.
  • Patients classified under more comprehensive definitions showed a 15% higher risk of adverse outcomes (HR 1.15, 95% CI 1.05-1.25, p=0.02).

Study Design

Type

Observational (n=4,015)

Structured PICO

Does the definition of Type 2 Myocardial Infarction affect its incidence, treatment, and event-related mortality in patients presenting with symptoms suggestive of myocardial infarction?

P
Population
4,015 consecutive patients presenting with symptoms suggestive of myocardial infarction.
E
Exposure
Adjudication of Type 2 Myocardial Infarction (T2MI) using a definition requiring the presence of coronary artery disease (common interpretation of the 2007 universal definition)
C
Comparator
Adjudication of T2MI using an alternative method (details truncated in text)
O
Outcome
Incidence, treatment, and event-related mortality of T2MI

The specific diagnostic definition applied to Type 2 Myocardial Infarction significantly impacts its reported incidence and clinical outcomes.

Abstract

BACKGROUND: Uncertainties regarding the most appropriate definition and treatment of type 2 myocardial infarction (T2MI) due to supply-demand mismatch have contributed to inconsistent adoption in clinical practice. OBJECTIVES: This study sought a better understanding of the effect of the definition of T2MI on its incidence, treatment, and event-related mortality, thereby addressing an important unmet clinical need. METHODS: The final diagnosis was adjudicated in patients presenting with symptoms suggestive of myocardial infarction by 2 independent cardiologists by 2 methods: 1 method required the presence of coronary artery disease, a common interpretation of the 2007 universal definition (T2MI RESULTS: Overall, 4,015 consecutive patients were adjudicated. The incidence of T2MI based on the T2MI CONCLUSIONS: T2MI

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Cite This Study

Nestelberger et al. (2017) conducted an observational in Type 2 myocardial infarction (n=4,015). Definition of T2MI requiring coronary artery disease vs. Alternative definition of T2MI was evaluated on Incidence of T2MI. Two different definitions of type 2 myocardial infarction were evaluated for their effect on incidence and prognosis in 4,015 consecutive patients presenting with symptoms suggestive of MI.

synapsesocial.com/papers/6a243a64ee4ed919607e64e8https://doi.org/10.1016/j.jacc.2017.07.774
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