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Murine Myocardial Infarction Model using Permanent Ligation of Left Anterior Descending Coronary Artery
Published on: August 16, 2019
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Type 2 Myocardial Infarction: A Geriatric Population-based Model of Pathogenesis
Alain Putot1,2, Melanie Jeanmichel3, Frederic Chague3
11Geriatric Department, University Hospital of Dijon Bourgogne, France.
Aging and Disease
|February 4, 2020
Summary
Type 2 myocardial infarction (T2MI) is challenging to distinguish from type 1 myocardial infarction (T1MI), especially in older adults. This study found chronic anemia, aortic stenosis, and respiratory infections are key factors in T2MI.
Area of Science:
- Cardiology
- Geriatrics
- Internal Medicine
Background:
- Distinguishing type 2 myocardial infarction (T2MI) from type 1 myocardial infarction (T1MI) is clinically difficult, particularly in elderly patients.
- T2MI results from myocardial oxygen supply-demand imbalance, unlike T1MI caused by plaque disruption.
Purpose of the Study:
- To identify characteristics and causes of T2MI using a geriatric approach.
- To differentiate T2MI from T1MI in a large patient cohort.
Main Methods:
- Prospective, multicenter, population-based study of 4572 patients in coronary care units.
- Adjudication of T1MI and T2MI based on the 3rd universal definition and a geriatric T2MI pathogenesis model.
- Multivariate analysis to identify risk factors for T2MI versus T1MI.
Main Results:
- 19% of patients had T2MI (n=862), who were older, more frequently female, and had more comorbidities than T1MI patients.
- Factors associated with T2MI included acute heart failure, tachycardia, and elevated C-reactive protein.
- Key T2MI mechanisms involved age-related decline, chronic factors (anemia, aortic stenosis), and acute triggers (infection, tachyarrhythmia, heart failure).
Conclusions:
- Chronic anemia and severe aortic stenosis predispose individuals to T2MI.
- Acute respiratory infection is the most frequent trigger for T2MI.
- Findings illuminate age-related pathophysiological bases for T2MI, highlighting oxygen supply-demand discrepancies.
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