The normal range of ultrasensitive troponin is ≤0.014 μg/L, and myocardial injury is considered to be present if it is greater than the upper limit of the normal range. If ultrasensitive troponin is >0.1 μg/L, it is called a critical value, suggesting the presence of severe myocardial injury.
Ultrasensitive troponin is the most specific and sensitive indicator of myocardial injury and necrosis, and it is a unique component of cardiomyocytes, which is basically undetectable in the blood under normal conditions. Under normal conditions, it is not detected in the blood. Only when cardiomyocyte damage occurs can elevated troponin be detected in the blood.
An increase in ultrasensitive Troponin above the upper limit of the normal value suggests the presence of myocardial cell damage or necrosis, most commonly due to acute myocardial ischemia, acute myocardial infarction, acute myocarditis, etc. In patients with chest pain who are suspected of having acute coronary syndrome, if ST-segment elevation or pathologic Q waves are present on the ECG, combined with elevated high-sensitivity troponin, acute myocardial infarction is considered to be highly likely.
If high-sensitivity troponin is elevated, seek medical attention promptly to avoid delay.