Which one of the following cardiac biomarkers is elevated about 50 times the upper limit of normal at 24 hours after onset of an acute myocardial infarction?

Question

Quizplus · Accepted Answer

Troponin is the most specific biomarker for myocardial injury, with levels elevated about 50 times the upper limit of normal at 24 hours after onset of an acute myocardial infarction. Total CK and CK-2 (CKMB) are also elevated in the setting of myocardial injury, but not to the same extent as troponin. Myoglobin is an early and sensitive biomarker for myocardial injury, but its elevation is short-lived and not as specific as troponin.

Which One of the Following Cardiac Biomarkers Is Elevated About