This multicenter randomized controlled trial compare two transfusion strategies of red blood cells transfusion in patients supported by veno-arterial extracorporeal membrane oxygenation for refractory cardiogenic shock. An individualized transfusion strategy based on ScVO2 level, is compared to a conventionnal strategy based on predefined hemoglobin threshold. The primary endpoint is the consumption of packed red blod cells, secondary endpoints are subgroup analysis, mortality, morbidity, and cost-effectiveness
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Number of PRBCs transfused per VA-ECMO day of support
Timeframe: From randomisation until VA-ECMO weanning assessed up to 28 days