The study of the prognostic impact of blood transfusion at 1 year in patients assisted by Veno-arterial extracorporeal membrane oxygenation in the context of cardiogenic shock would provide objective answers and optimize the decision to set up this assistance with regard to the possible long-term consequences. This decision currently remains at the discretion of the expert teams managing these patients.~The inclusion of patients in a state of cardiogenic shock under Veno-arterial extracorporeal membrane oxygenation with the need for transfusion, will therefore allow the elaboration of a multicentric observational study interested in the prognosis at 1 year of patients under VA ECMO according to the adopted transfusion threshold.
The primary objective of this work is to study the 1-year prognosis of patients who received Veno-arterial extracorporeal membrane oxygenation for cardiogenic shock with the need for blood transfusion. Secondary objectives are to determine whether the transfusion strategy used (liberal or restrictive) still has an impact on overall mortality. We will also determine the factors associated with overall in-hospital mortality and look at the impact of transfusion in relation to the risk of hemolysis on the consequences in the occurrence of long-term chronic renal failure.