Prognostic Role of High Sensitivity Troponin During Follow up in the Evolution of Acute Myocarditis

Inclusion Criteria: * Male or female patients over 18 years of age * Patients hospitalized at Grenoble Alpes University Hospital and Lyon University Hospital between June 2016 and June 2025 * Having presented chest pain and ≥1 diagnostic criteria or if no chest pain, presence of ≥2 diagnostic criteria below : * Electrical abnormalities (supra- or sub-ST, T-wave inversion, atrioventricular blocks 1-3 conduction disorders) * Elevation of cardiac biomarkers (troponin) * Kinetic abnormalities on cardiac ultrasound * Associated with ≥2 MRI criteria of tissue abnormality (edema, hyperhemia, myocardial fibrosis) * Patient affiliated to a social security scheme or beneficiary of such a scheme * No opposition to participation Exclusion Criteria: * Absence of documented coronary artery disease (cardiac CT or coronary angiography) or age \<30 and low risk of coronary artery disease. * Myocarditis secondary to immunotherapy. * Presence of documented coronary artery disease (coronary angiography or cardiac CT) * Presence of cardiomyopathy (hypertrophic cardiomyopathy, dilated cardiomyopathy) * Infiltrative heart disease (sarcoidosis or cardiac amyloidosis) * Severe valve disease * Takotsubo * Constrictive or chronic pericarditis * Loeffler's endocarditis * Non-compaction of the left ventricle * Cardiac tumor * Pulmonary embolism * Coronary spasm * Patients covered by articles L1121-5 to L1121-8 of the French Public Health Code (pregnant women, parturients, nursing mothers; persons deprived of liberty by judicial or administrative decision; protected adults)