TNNI3 and ischemia: Under these conditions, one of the following criteria meets the diagnosis of MI: Rise of cardiac biomarkers such as cardiac troponin I (cTnI) and creatine kinase (CK); vicissitude in ECG such as ST elevation and development of Q waves; Imaging evidence of loss of viable myocardium;3 Symptoms of ischemia and Identification of an intracoronary thrombus by angiography.4