PREdisposition Genetical in Cardiac Insufficiency = Genetic Predisposition to Heart Failure

The research program comprises 4 phases: a selection phase at D0-D1, a pre-inclusion and an inclusion phase at D4±2, a visit at M6, and a 5 year follow up phase. Visit at Day 0 - Day 1: * The first 12-lead ECG, to be included in the observation book, is performed. * The first blood sample is taken. Visit at Day 4±2: * The first transthoracic echocardiography is performed in all patients selected. * In the presence of at least 3 akinetic LV segments at the transthoracic echocardiography, the patient is included. * Demographic data, medical and surgical anteriority, detailed circumstances of occurrence of the MI and any other relevant information is obtained during an interview. * The second 12-lead ECG is performed. * The second blood sample is taken. * The first MRI is performed (optional) Visit at 6 months: * The second transthoracic echocardiography is performed. * The third 12-lead ECG is performed. * The third blood sample is taken. * A 24-hour Holter-ECG monitoring is performed (optional) * The second MRI is performed (optional) Five year follow up (phone contact until 7 years after inclusion): Each patient included at day 4±2 will be contacted by phone 1, 2, 3, 4 and 5 years post-MI to obtain information regarding cardiovascular events and hospitalizations. If the patient cannot be contacted directly, we will try to contact a member of his/her family or his/her family physician.