What is MI with non obstructive coronary arteries (MINOCA)?

Evidence of MI with normal angio or near normal coronary arteries and no other explanation for the presentation. Spasm, plaque erosion/rupture, coronary dissection are common etiologies of MINOCA. Pt survived STEMI w/out evidence of CAD better outlook than atherosclerotic mediated STEMI, in hospital mortality 60% lower and 1 year mortality 40% lower. cardiac MRI recommended to exclude myocarditis w/out clear cause of MINOCA.