Table 1

Diagnostic confidence in determination of culprit lesion in patients who fulfil our definition of myocardial infarction

Diagnostic confidence	Criteria
Highly probable location of lesion	▸ Thrombus or features of recent plaque rupture (irregular margins, hazy appearance and dissection) coronary plaque fissure seen on invasive angiography or ▸ New area of infarction on cardiac MRI
Probable location of lesion	▸ New perfusion abnormality identified on SPECT testing ▸ New wall motion abnormality (as determined through comparison of preoperative and postoperative echocardiography or MRI ▸ New wall motion abnormality as determined through comparison of preoperative CTA myocardial function and postoperative echocardiography or ▸ New Q waves in two contiguous leads on the patients ECG
Possible location of lesion	▸ ST segment elevation (≥2 mm in leads V₁, V₂ or V₃ OR ≥1 mm in the other leads) in two contiguous leads ▸ ST segment depression (≥1 mm) in two contiguous leads ▸ Symmetric inversion of T waves ≥1 mm in at least two contiguous leads or ▸ Presumed new cardiac wall motion abnormality on echocardiography ▸ Presumed new fixed defect on SPECT testing