Data collection
chronic kidney disease
DIABETES MELLITUS, LEFT HEART FAILURE, ACUTE HEART FAILURE, HYPERTENSION
Baseline covariates and follow-up of patients were collected retrospectively by medical record consultation and computer extraction of biological data. The following covariates were collected at baseline: age, height, weight (with calculation of body surface area according to Boyd's formula), sex, Simplified Acute Physiology Score (SAPS) II at ICU admission, history of chronic left heart failure, hypertension, previous sternotomy, chronic kidney disease, diabetes mellitus, indication for surgery, and type of acute heart failure at beginning of ECMO support. The following covariates were collected daily during the ICU stay: creatinine, total bilirubin, platelet count, ECMO output, ongoing renal replacement therapy (RRT), lactate, total epinephrine dose, total norepinephrine dose, and total dobutamine dose. If multiple values were available for a covariate, the maximum value for the day was retained, except for platelet count, for which the minimum value was retained.The daily biological SOFA score was calculated from the daily values of creatinine, platelet count, and total bilirubin, as described elsewhere [