These conditions can be satisfied by a rise of cardiac markers (preferably cardiac troponin [cTn]) above the 99th percentile of the upper reference limit (URL) plus at least one of the following: Symptoms of ischemia ECG changes indicative of new ischemia (significant ST / T changes or left bundle branch block) Development of pathologic Q waves Imaging evidence of new loss of myocardium or new regional wall motion abnormality Angiography or autopsy evidence of intracoronary thrombus Slightly different criteria are used to diagnose MI during and after percutaneous coronary intervention or coronary artery bypass grafting, and as the cause of sudden death.