Physical activity, exercise and cardiac troponins: Clinical implications
Kristin M Aakre1, Torbjørn Omland2
1Hormone Laboratory, Haukeland University Hospital, Bergen, Norway; Department of Clinical Science, University of Bergen, Bergen, Norway.
Progress in Cardiovascular Diseases
|February 25, 2019
Summary
Cardiac troponins (CTn) are key heart injury biomarkers. While exercise can raise CTn levels, potentially mimicking heart attacks, research explores differentiating these causes and CTn
Area of Science:
- Cardiology
- Biomarkers
- Exercise Physiology
Background:
- Cardiac troponins (CTn) are specific biomarkers for cardiomyocyte injury and diagnosing myocardial infarction.
- Elevated CTn levels after strenuous exercise present diagnostic challenges, often considered physiological but potentially indicating minor injury.
- Chronic low-level CTn elevation is linked to adverse cardiovascular outcomes, including heart failure and CVD death.
Purpose of the Study:
- To explore the interpretation challenges of exercise-induced CTn elevation.
- To investigate the potential for exercise-induced minor myocardial injury.
- To highlight the prognostic value of CTn in cardiovascular disease and the impact of physical activity.
Main Methods:
- Review of existing literature on cardiac troponin release following exercise and in cardiovascular disease.
- Analysis of the diagnostic and prognostic implications of CTn measurements.
- Discussion of potential future methods for differentiating CTn release sources.
Main Results:
- Exercise-induced CTn elevation can complicate acute myocardial infarction diagnosis.
- While often physiological, the long-term effects of repeated exercise-induced CTn release are not fully understood.
- CTn levels, even within normal ranges, provide significant prognostic information for cardiovascular events and mortality.
- Higher physical activity is associated with lower CTn concentrations, while sedentary lifestyles correlate with higher levels and increased heart failure risk.
Conclusions:
- Differentiating exercise-induced CTn release from ischemic injury remains challenging, though future fragment analysis may help.
- Cardiac troponins are crucial prognostic markers across the cardiovascular disease spectrum.
- Promoting physical activity and monitoring CTn levels may be valuable for lifestyle interventions and cardiovascular risk assessment.
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