What question did this study set out to answer?

Review the biochemical, physiological, and clinical relevance of biological variability in cardiac troponin I and T measurements.

November 26, 2020Clinical Chemistry and Laboratory Medicine (CCLM)Open Access

Clinical relevance of biological variation of cardiac troponins

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Why the study?

To discuss the relevant biochemical, physiological, and clinical issues related to biological variability of cardiac troponin I and cardiac troponin T.

Key Points

Review the biochemical, physiological, and clinical relevance of biological variability in cardiac troponin I and T measurements.
Synthesized literature on high-sensitivity cardiac troponin I (hs-cTnI) and T (hs-cTnT) immunoassay performance.
Evaluated analytical imprecision, intra-individual biological variation, and reference change values (RCV) for acute coronary syndrome diagnosis and cardiovascular risk stratification.
High-sensitivity cardiac troponin assays demonstrated a low intra-individual index of variation (<0.6) and reduced analytical imprecision of approximately 5% CV at the 99th percentile upper reference limit.
Serial measurement differences exceeding a reference change value of 30% represent statistically significant shifts, improving diagnostic accuracy for acute coronary syndromes in emergency settings.
Troponin testing aided cardiovascular risk assessment in high-risk comorbidities including hypertension, diabetes mellitus, severe obesity, and renal insufficiency, though population-wide screening remains unproven.

Structured PICO

Population

Patients evaluated for acute myocardial infarction (AMI) or cardiovascular risk stratification

Intervention

High-sensitivity cardiac troponin (hs-cTnI and hs-cTnT) assays

Outcome

Biological variability and diagnostic accuracy for acute coronary syndromessurrogate

High-sensitivity cardiac troponin assays exhibit low biological variation and high analytical precision, enhancing their utility in diagnosing acute coronary syndromes and evaluating cardiovascular risk.

Limitations

Screening programs in the general population require further investigation to define optimal target populations, timing of measurement, and preventive interventions.

Discussion

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Implication

Biological variability of hs-cTn warrants cautious serial testing interpretation; leaves open assay-specific reference change values for practice.

Cite This Study

Clerico et al. (2020) studied this question.

synapsesocial.com/papers/6a6ff31e31a3df8243283e08 https://doi.org/10.1515/cclm-2020-1433

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Implication

Biological variability of hs-cTn warrants cautious serial testing interpretation; leaves open assay-specific reference change values for practice.

Clinical relevance of biological variation of cardiac troponins

Key Points

Structured PICO

Limitations

Discussion

Implication

Cite This Study

Clinical relevance of biological variation of cardiac troponins

Key Points

Structured PICO

Limitations

Discussion

Implication

Cite This Study

Also Consider

Also Consider