Universal Classification of Myocardial Infarction and Injury
| Type 1 | Spontaneous infarction due to plaque rupture |
| Type 2 | Myocardial injury secondary to either increased oxygen demand or reduced supply, for example coronary spasm or embolism, arrhythmia, hypotension, anaemia, hypertension, respiratory failure |
| Type 3 | Sudden unexpected cardiac death associated with ECG changes or fresh thrombus in the coronary artery but occurring before an elevation in cardiac biomarkers |
| Type 4 | Associated with intervention either percutaneous (4a) or stent thrombosis (4b) or restenosis (4c) |
| Type 5 | Associated with coronary artery by-pass grafting (CABG) |