TNNI3 and myocardial infarction: The median levels of cTnI, an indicator of myocardial infarction, were 0.01 (0.005, 0.04), 0.02 (0.008, 0.02), and 0.3 (0.04, 1.9) μg/ml in the SCAD, UA, and MI groups, respectively.