Table 1: Criteria for and different types of acute myocardial infarction as defined in Thygesen et al. 2012 [6].

Criteria for the Definition of Acute Myocardial Infarction

The term myocardial infarction (MI) should be used when there is evidence of myocardial necrosis in a clinical setting consistent with acute myocardial ischemia.
Detection of a rise or fall of cardiac biomarker values (preferably cardiac troponin) with at least one value above the 99th percentile URL together with at least one of the following:
 (i) symptoms of ischemia,
 (ii) new significant ST changes or LBBB,
 (iii) development of pathological Q-waves,
 (iv) imaging evidence,
  (v) intracoronary thrombus.

Type 1: Spontaneous myocardial infarction
MI related to atherosclerotic plaque rupture with resulting intraluminal thrombus in the coronary artery.

Type 2: Myocardial infarction secondary to an ischemic imbalance
MI where a condition other than CAD contributes to an imbalance between oxygen supply and demand.

Type 3: Myocardial infarction resulting in death when biomarkers are unavailable
Cardiac death with symptoms of myocardial ischemia and presumed new ECG changes but death occurring before biomarkers results are available or before biomarkers could rise.

Type 4a: Myocardial infarction related to PCI
MI associated with PCI arbitrarily defined by
 (i) an elevation of cTn >5 times the 99th percentile URL in patients with normal cTn baseline values,
 (ii) a rise of cTn >20% in patients with elevated baseline cTn values
 plus
  (i) symptoms suggestive of ischemia,
  (ii) new ischemic ECG changes,
  (iii) angiographic evidence, or
  (iv) imaging evidence.

Type 4b: Myocardial infarction related to stent thrombosis
MI related to stent thrombosis is detected by coronary angiography or autopsy in the—setting of myocardial ischemia plus
(i) a rise or fall of cardiac biomarkers above the 99th percentile URL.

Type 5: Myocardial infarction related to CABG:
MI related to CABG is arbitrarily defined by
 (i) an elevation of cTn >10 times the 99th percentile URL in patients with normal cTn baseline values
  plus
  (i) new pathological Q-waves or LBBB,
  (ii) angiographic evidence, or
  (iii) imaging evidence.