a Total vessel density (TVD), b perfused vessel density (PVD) and c portion of the perfused vessels (PPV) in all vessels (length between 25 and 100 Îźm) at flow time points of 100% ECMO flow (F100) and 50% ECMO flow (F50) are compared between patients successfully and not successfully weaned (SW and NSW, respectively). (TIF 3043 kb)