Key result
Type 2 MI carries an adverse prognosis but lacks uniform definitions and optimal management strategies.
Why the study?
Limited data define optimal management for T2MI, and clinical care is hindered by the absence of a uniform, reproducibly operationalized definition.
Key Points
- To clarify the diagnosis, treatment, and prognosis of type 2 myocardial infarction (T2MI).
- Synthesis of existing data on T2MI
- Analysis of clinical evidence for diagnosis
- Recommendations for individualized care strategies
- Increased sensitivity of cardiac troponin assays leads to more T2MI diagnoses.
- T2MI is linked with poor short-term and long-term outcomes.
- Individualized management strategies are essential due to the heterogeneous nature of T2MI.
Structured PICO
P
Population
Patients with Type 2 Myocardial Infarction (T2MI)
This document synthesizes current data on Type 2 Myocardial Infarction to guide clinical understanding, diagnosis, and individualized management.
Limitations
- Limited data exist defining optimal management strategies because T2MI is a heterogeneous entity with varying etiologies and triggers.
- Absence of a uniform definition that can be operationalized with high reproducibility.
Key expert perspectives
Captured external expert commentary on this paper, strongest first. Original sources are linked where available.
“Some doctors have incorrectly called this type 1 and given the wrong treatment, which can be harmful. Treatment should be directed at the underlying condition, for example blood pressure lowering medications for patients with hypertension.”
“Unless there is clarity in the emergency room on what defines a heart attack, patients with chest pain may be wrongly labeled with heart attack and not receive the correct treatment. Many doctors have not understood that elevated troponin levels in the blood are not sufficient to diagnosis a heart attack and this has created real problems.”
“In the consensus document we have expanded the section on type 2 myocardial infarction and included three figures to help doctors make the correct diagnosis. The incorporation of type 2 into the ICD codes is another step towards accurate recognition followed by appropriate treatment.”
Implication
Rising T2MI diagnoses from sensitive assays carry poor prognosis; leaves open targeted therapies in this heterogeneous condition.
Abstract
Acute myocardial infarction (MI) can occur from increased myocardial oxygen demand and/or reduced supply in the absence of acute atherothrombotic plaque disruption; a condition called type 2 myocardial infarction (T2MI). As with any MI subtype, there must be clinical evidence of myocardial ischemia to make the diagnosis. This condition is increasingly diagnosed due to the increasing sensitivity of cardiac troponin assays and is associated with adverse short-term and long-term prognoses. Limited data exist defining optimal management strategies because T2MI is a heterogeneous entity with varying etiologies and triggers. Thus, these patients require individualized care. A major barrier is the absence of a uniform definition that can be operationalized with high reproducibility. This document provides a synthesis of the data about T2MI to assist clinicians' understanding of its pathobiology, when to deploy the diagnosis, and its associated treatments. It also clarifies prognosis, identifies gaps in knowledge, and provides recommendations for moving forward.
Discussion
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Cite This Study
Sandoval et al. (2019) conducted a review in Type 2 Myocardial Infarction. Type 2 myocardial infarction is a heterogeneous condition associated with adverse prognosis, lacking a uniform definition and optimal management strategies.