18F-deoxyglucose (FDG) PET-CMD

Inclusion Criteria: * Patients above 18 years of age * Patients with DCM as defined by the European Society of Cardiology and recognized as such by the clinician cardiologist * DCM diagnosed for more than two weeks without new ventricular arrhythmias or AuriculoVentricular Block (AVB) second or third degree , who responded to the usual treatment in the first two weeks of treatment * No family history of DCM * Lake of clinical or biological cases for periphiral myopathy or myotonia * Absence of other causes of non-family DCM discovered during the initial etiological ( some deficiency , toxic alcoholic or drug ) * Patients who underwent cardiac MRI for etiological DCM for less than four weeks at the time of obtaining consent * Patients who have read and understood the information letter and who signed the consent form * Affiliated to a social insurance Exclusion Criteria: * Ischemic cardiomyopathy defined by history of myocardial infarction or myocardial revascularization , stenosis ≥ 75% of the core or the left coronary artery anterior interventricular proximal stenosis ≥ 75% on at least two epicardial vessels * Significant organic valvular echocardiography * Eosinophilia or immuno- allergic mechanism suspected * History of acute myocarditis * History of sarcoidosis * Family history of DCM * History of chemotherapy with anthracyclines * Patient with signs of circulatory failure or congestive heart failure requiring intravenous positive inotropic therapy or diuretic therapy …