Table 1.1. Myocardial injury and infarction¹.

Definition of myocardial injury
The term myocardial injury should be used in patients with cardiac troponin values > 99th percentile of the upper reference limit. The injury is considered acute if there is dynamic behavior (rising and/or falling from baseline). Persistently high troponin values are considered chronic myocardial injury.
Definition of acute myocardial infarction (AMI types 1, 2 and 3)
AMI implies an acute myocardial injury in a clinical context of myocardial ischemia: Symptoms suggestive of acute myocardial ischemia New ischemic change in ECG New pathological Q-wave in ECG Imaging results showing a change in contractility or loss of viable myocardium consistent with ischemic etiology Intracoronary thrombus identified by angiography or necropsy (type 1 only)