Clinical management of patients with chest pain and elevation of biomarkers of myocardial injury require an accurate diagnosis. Until now, cardiac magnetic resonance imaging (cMRI) is the gold standard for the diagnosis among myocarditis, stress cardiomyopathy, or inapparent ischemic damage. The development of spectral CT has opened up the possibility of characterizing the coronary anatomy and the myocardium in a single procedure. Our aim is to assess the diagnostic ability of differential patterns in first- pass perfusion and delayed iodine enhancement obtained by spectral CT in patients with acute myocardial injury. This study is designed as a prospective multicenter observational study with diagnostic intervention in 150 patients admitted with clinical indication of a cMRI due to suspicion of myocardial infarction with normal coronary arteries (MINOCA), myocarditis or stress cardiomyopathy who will undergo a CT study with double detector technology in two reference centers. A control group (n=150) with an indication for cardiac CT for another cause without coronary or structural heart disease will be included. The iodine maps obtained by spectral CT will be compared with the findings obtained with cMRI, both with conventional techniques and with artificial intelligence algorithms (deep learning). A year follow-up of the cohort will be carried out to assess whether the findings derived from the CT in this group of patients provide prognostic information

Inclusion Criteria:

• Age ≥ 18 year.
• Hospital admission due to chest pain and acute myocardial injury.
• Clinical indication for cardiac MRI (CMR) due to suspected acute myocardial infarction with coronary angiography showing no significant lesions (<50%) (MINOCA), acute myocarditis, or stress-induced cardiomyopathy.
• Signed informed consent.

Exclusion Criteria:

• Contraindications to undergo cardiac MRI and CT with administration of gadolinium and/or iodine-based contrast, respectively.
• Pre-existing cardiomyopathy.
• Pre-existing chronic ischemic heart disease.
• Invasive coronary angiography showing coronary lesions ≥50%.

Patients admitted with a suspected diagnosis of acute myocardial injury or subjects with a clinical indication for cardiac CT (CCT) for other reasons without myocardial injury or previous structural heart disease, with ≤1 cardiovascular risk factor, left ventricular ejection fraction > 55%, and absence of significant valvular disease (grade < III), with a similar age and sex distribution to cases with a clinical indication for CCT for other reasons.