Inclusion Criteria:  Patient supported by veino-arterial ECMO for cardiogenic shock for less than 6 hours Affiliation to social protection  Exclusion Criteria:  Age < 18 ans Pregnancy Opposition of the patient or his relatives Cannulation during cardiopulmonary resuscitation Cardiopulmonary resuscitation duration > 10 minutes before ECMO implantation Patient moribound on the day of randomization Chronic hemodialysis Chronic intestinal disease