2008 - Classification of AMI

In 2007 the powers-that-be came up with a new classifcation for MI:

To be diagnosed with an acute MI, need a rise in enzymes + symptoms of ischaemia, or, enzymes + ECG changes (ST-T or LBBB or Q), or enzymes + RWMA.

To be diagnosed with a prior MI, need to either see pathological Q waves or a thin and poorly contractile wall without any non-ischaemic reason being able to explain it.

Definitions were also created for PCI-related MI:- 3 x the upper limit of normal rise in enzymes. Then there is a subclassification of "myocardial necrosis" which is defined as above the upper limit of normal rise in enzymes.

Finally, definitions were created for CAGS-related MI:- 5 x upper limit PLUS ECG changes (new Q or new LBBB) or on imaging, new loss of viable myocardium, or an angiogram showing a new occlusion in a graft or native vessel.