Cohort of STEMI Patients 2

Who May Qualify: - Age ≥ 18 years - Diagnosis of STEMI defined by ST segment elevation ≥ 0.2 mV in 2 contiguous leads on a 12-lead ECG. - Management in primary ACT - Prior oral willing to sign a consent form followed by signed willing to sign a consent form as soon as possible. Who Should NOT Join This Trial: - Diagnosis of STEMI not confirmed on angiography - Inability to give the subject informed information - Lack of coverage by a social security scheme - Obvious contraindication to injected magnetic resonance imaging (claustrophobia, pacemaker, defibrillator, or a metallic body (ferromagnetic), severe renal insufficiency (GFR\<30 ml/min), known allergy to the contrast medium ....) - Pregnant woman or woman of childbearing age without effective contraception, breastfeeding woman. - Deprivation of civil rights (curators, guardianship, safeguard of justice) Always talk to your doctor about whether this trial is right for you.