Prevalence of Myocarditis in Patients Suspected Myocardial Infarction With Non-Obstructive Coronary Arteries

Inclusion Criteria: * All patients; diagnosed with myocardial infarction with nonobstructive coronary arteries (MINOCA) * clinical symptoms * ECG : ischemic changes with or without ST segment elevation * Echocardiograpy : segmental wall motion abnormalities (SWMA) * positive cardiac enzymes * Coronary angiography: insignificant lesions ,the absence of culprit obstructive coronary artery disease (epicardial coronary artery stenosis ≥50%) Exclusion Criteria: * Significant coronary artery disease (\>50% stenosis) on angiography. * Prior history of myocarditis or cardiomyopathy. * Contraindications to CMR (e.g., pacemakers, severe renal dysfunction).