Elevated Cardiac Troponin in Clinical Scenarios Beyond Obstructive Coronary Artery Disease
Michael Sternberg1, Evasio Pasini2, Carol Chen-Scarabelli3
1Department of Internal Medicine, Virginia Commonwealth University, Richmond, VA, USA.
Insights
Elevated cardiac troponin levels, often assumed to indicate heart damage, require careful interpretation beyond obstructive coronary artery disease. Understanding underlying causes is key for accurate diagnosis and tailored patient treatment strategies.
Area of Science:
- Cardiology
- Biomarkers
- Clinical Diagnostics
Background:
- Cardiac troponin elevations are frequently misinterpreted, often presumed to solely indicate myocardial damage.
- Current diagnostic approaches rely on unconfirmed assumptions regarding troponin's origin and implications.
- Understanding the pathophysiology of cardiac biomarker release is crucial for accurate clinical interpretation.
Purpose of the Study:
- To systematically review current evidence on cardiac troponin elevations outside of obstructive coronary artery disease.
- To clarify the diagnostic significance and clinical impact of elevated cardiac troponin in complex scenarios.
- To aid clinicians in diagnosing and optimizing treatment for patients with elevated cardiac troponin.
Main Methods:
- Systematic review of the latest scientific evidence.
- Analysis of pathophysiologic mechanisms behind cardiac biomarker release.
- Evaluation of confounding factors (cardiac and non-cardiac) affecting biomarker levels.
Main Results:
- Cardiac troponin elevations have diverse etiologies beyond myocardial infarction.
- Non-myocardial causes and confounding factors significantly influence troponin levels.
- Cardiac biomarkers are valuable for risk stratification and prognostication.
Conclusions:
- Accurate interpretation of cardiac troponin requires investigating underlying pathophysiologic mechanisms.
- Considering confounding factors is essential for precise diagnosis and management.
- This review provides clarity on elevated troponin in real-world clinical dilemmas, facilitating tailored treatments.
Abstract:
In this systematic review article, we aim to summarize the most up-to-date evidence regarding elevations of cardiac troponin, especially in clinical scenarios other than obstructive coronary artery disease. The accurate interpretation of raised cardiac troponin is challenging because it relies on unconfirmed postulations and dogmatic knowledge (e.g., the exclusive provenience of cardiac troponin from cardiac myocytes), based on which every troponin elevation is assumed to definitely indicate myocardial damage. Indeed, the investigation of the pathophysiologic mechanism leading to the release in the bloodstream of cardiac biomarkers should be the first step of the diagnostic process to fully understand the clinical significance of the elevated serum levels and identify the best management. A prominent effort should be put in place to identify the contribution of potential confounding factors, both cardiac and non-cardiac in etiology, with the ability to affect synthesis and clearance of cardiac biomarkers. Regardless of the underlying cause, it is well established that cardiovascular biomarkers are increasingly useful to further risk stratification and prognosticate patients. Accordingly, we sought to clarify the meaning and impact of elevated cardiac troponin in those frequently encountered real-world scenarios presenting clinicians with a diagnostic dilemma, with the final goal of facilitating the diagnosis and help optimize individually tailored treatment strategies.
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