MI-Classes

A 2007 consensus document classifies myocardial infarction into five main types:

* Type 1 - Spontaneous myocardial infarction related to ischaemia due to a primary coronary event such as plaque erosion and/or rupture, fissuring, or dissection
* Type 2 - Myocardial infarction secondary to ischaemia due to either increased oxygen demand or decreased supply, e.g. coronary artery spasm, coronary embolism, anaemia, arrhythmias, hypertension, or hypotension
* Type 3 - Sudden unexpected cardiac death, including cardiac arrest, often with symptoms suggestive of myocardial ischaemia, accompanied by presumably new ST elevation, or new LBBB, or evidence of fresh thrombus in a coronary artery by angiography and/or at autopsy, but death occurring before blood samples could be obtained, or at a time before the appearance of cardiac biomarkers in the blood
* Type 4 - Associated with coronary angioplasty or stents:
o Type 4a - Myocardial infarction associated with PCI
o Type 4b - Myocardial infarction associated with stent thrombosis as documented by angiography or at autopsy
* Type 5 - Myocardial infarction associated with CABG