MI in absence of obstructive CAD
- Definition:
- MI but w/o coronary stenosis ≥50% in any major epicardial vessel
- More common
- in younger Pts,
- women,
- Black/Pacific race or Hispanic
- Advanced coronary imaging (eg, OCT) & cardiac MRI to exclude missed coronary obstruction, other causes of myocyte injury (eg, myocarditis), other causes of ↑ Tn (eg, PE)
- ~75% ischemic (ie, plaque disruption identified) and 25% alternative dx (eg, myocarditis)