TNNI3 and myocardial infarction: In patients with perioperative myocardial infarction (PMI), the level of H-FABP is high and it can be used as an earlier telltale sign than the cTnI biomarker to differentiate between patients with and without perioperative myocardial infarction one hour after CABG, compared to increased cTnI levels after about 12 h [6].