Definitions
Low flow time was defined as the time of advanced CPR until the commencement of ECMO circulation. Renal failure was defined as a rise in serum creatinine levels of more than 0.3mg/dL (26.5 μmol/L) over 48 hours or a rise in serum creatinine 1.5 times higher than average levels or newly developed reduction of urine at <0.5mL/kg/h over 6h.