Diagnostic value of exercise-induced changes in circulating high sensitive troponin T in stable chest pain patients

Area of Science:

• Cardiology
• Diagnostic Medicine
• Biomarkers

Background:

• Stable chest pain is a common clinical presentation.
• Accurate diagnosis of coronary artery disease (CAD) is crucial for patient management.
• Cardiac Troponin T (cTnT) is a biomarker for myocardial injury.

Purpose of the Study:

• To evaluate the diagnostic value of exercise-induced increases in cardiac Troponin T (cTnT).
• To assess the utility of cTnT measurements in diagnosing coronary artery disease (CAD) in patients presenting with stable chest pain.

Main Methods:

• 157 subjects with suspected CAD underwent an exercise test.
• Cardiac Troponin T (cTnT) levels were measured before and 20 hours after the exercise test.
• Comparison of cTnT levels and changes between subjects with and without CAD.

Main Results:

• Subjects with CAD (n=41) had significantly higher baseline cTnT levels (6.39 ng/l) than non-CAD subjects (n=116, 3.00 ng/l).
• A higher percentage of CAD subjects showed an increase in cTnT post-exercise (70.7% vs. 27.6%).
• The combined assessment including exercise-induced cTnT increase improved diagnostic reclassification by 19% (p=0.02).

Conclusions:

• Exercise-induced elevation in cTnT is associated with the presence of coronary artery disease (CAD).
• Incorporating cTnT measurements into diagnostic protocols enhances the evaluation of stable chest pain patients for CAD.
• This approach offers improved diagnostic accuracy for CAD.