Coronary Microvascular Dysfunction Assessments in Myocardial Infarction With Non-Obstructive Coronary Arteries

Who May Qualify: - Subject with age ≥19 years and acute myocardial infarction - Rise and/or fall of cardiac troponin with one level \>99 percentile plus ischemic signs/symptoms - Subject with non-obstructive coronary arteries - \<50% diameter stenosis or - fractional flow reserve (FFR) \>0.80 ③ Subject without previous history of coronary artery disease - Subject who performed invasive coronary angiography within 24 hours after presentation ⑤ Subject who eligible for invasive and non-invasive coronary physiologic assessment Who Should NOT Join This Trial: - Subject with obstructive coronary arteries - Subject with alternate diagnosis including sepsis, pulmonary embolism, myocarditis, Takotsubo syndrome, spontaneous coronary dissection, and other cardiomyopathies. - Subject with cardiogenic shock or cardiac arrest ④ Subject who has non-cardiac co-morbid conditions with life expectancy \<1 year ⑤ Subject or lactating women ⑥ Subject unable to provide consent Always talk to your doctor about whether this trial is right for you.