Next-Generation High-Sensitivity Cardiac Troponin Assays: Expanding the Diagnostic Window for Cardiac Injury
The evolution from conventional to high-sensitivity cardiac troponin assays has enabled detection of previously undetectable low-level elevations, facilitating earlier identification of minor cardiac injuries and prompting faster clinical intervention. This review traces the molecular structure of cTnI and cTnT isoforms, their release kinetics, guideline incorporation, and clinical performance characteristics. While enhanced sensitivity improves patient outcomes through earlier diagnosis, it also introduces interpretive challenges in distinguishing ischemic from non-ischemic cardiac injury and troponin elevations associated with non-cardiac conditions.
The original study
Detecting cardiac injury: the next generation of high-sensitivity cardiac troponins improving diagnostic outcomes.
- Authors
- Lippi G, Lavie CJ, Sanchis-Gomar F
- Journal
- Clinical chemistry and laboratory medicine
- Type
- Journal Article, Review
- PMID
- 40319385
Original abstract
Cardiac injury, encompassing a spectrum of heart muscle damage, requires prompt and accurate diagnosis to improve patient outcomes. Early detection using cardiac biomarkers is vital for timely intervention and reducing mortality. This review highlights the role of high-sensitivity cardiac troponins (hs-cTns) in diagnosing cardiac injury. This article offers an overview of cardiac injury, including its causes, diagnostic challenges, and the evolution of biomarkers, up to the development and commercialization of "high-sensitivity" (hs-) cTns. The molecular structure of cardiac isoforms cTnI and cTnT, release kinetics, guidelines incorporation, diagnostic performance, and clinical application will be analyzed. It is concluded that the advent of hs-cTn assays has further expanded diagnostic capabilities by enabling the detection of low-level cTn elevations, which were previously undetectable using conventional methods. This enhanced sensitivity allows earlier identification of even minor cardiac injuries, facilitating prompt intervention and improving patient outcomes. However, this increased sensitivity also introduces interpretive challenges in understanding the nature of cardiac involvement, especially in distinguishing mild cTn elevations that may signify non-ischemic cardiac injury or be associated with other non-cardiac conditions.