Troponin may elevated or normal, but not usually as high as with traditional STEMI
ECG
May mimic STEMI
Frequently affects the anterior distribution and to a lesser extent inferior distribution
Echocardiography
Systolic Dysfunction (with ejection fraction dropping from normal to <25-35%)
Reduced contractility not explained by single vessel disease
Apical Ballooning on US
May mimic STEMI
Frequently affects the anterior distribution and to a lesser extent inferior distribution
Systolic Dysfunction (with ejection fraction dropping from normal to <25-35%)
Reduced contractility not explained by single vessel disease
Apical Ballooning on US
Ventriculography
Shows LV ballooning
Angiogram
No significant coronary blockage to explain LV dysfunction
Shows LV ballooning
No significant coronary blockage to explain LV dysfunction
Takotsubo cardiomyopathy
Cardiac
ST-segment elevation myocardial infarction
ST-segment elevation myocardial infarction 
Acute coronary syndrome 
Post-MI 
Non-ST-elevation myocardial infarction
Previous MI with recurrent ischemia in same area