V-V ECMO 1 V-VA ECMO 1 adult 1 article 1 cannulation 1 cannulation strategy 1 controlled study 1 echocardiography 1 extracorporeal membrane oxygenation (ECMO) 1 extracorporeal oxygenation 1 female 1 human 1 inotropism 1 male 1 mortality 1 retrospective study 1 survival 1 vasoactive inotropic score 1 veno-arterial ECMO