High-Sensitivity Cardiac Troponin for Risk Assessment in Patients With Chronic Coronary Artery Disease

Area of Science:

• Cardiology
• Biomarkers
• Risk Stratification

Background:

• Cardiac troponin is established for acute coronary syndrome risk stratification.
• Its utility in other clinical settings, like chronic coronary artery disease, is less clear.

Purpose of the Study:

• To assess if cardiac troponin testing improves risk stratification in chronic coronary artery disease patients.
• To determine if this is independent of disease severity and conventional risk factors.

Main Methods:

• Prospective cohort study of 4,240 patients undergoing coronary angiography for stable angina symptoms.
• High-sensitivity cardiac troponin I measured pre-angiography, with clinicians blinded to results.
• Primary outcome: myocardial infarction or cardiovascular death over a median follow-up of 2.4 years.

Main Results:

• In 3,888 patients with coronary artery disease, 255 experienced primary outcome events.
• Troponin levels were twofold higher in patients with events (6.7 ng/L vs 3.3 ng/L).
• Elevated troponin predicted outcomes independently (aHR 2.3), with levels >10 ng/L indicating a 50% increased risk.

Conclusions:

• Cardiac troponin predicts myocardial infarction or cardiovascular death risk in chronic coronary artery disease, independent of other factors.
• Further research is needed to explore routine troponin testing for guiding treatment intensification in high-risk patients.