Furthermore , there were no significant between-group differences in either adverse events or the secondary end points of perioperative myocardial injury ( assessed on the basis of the area under the curve for the high-sensitivity assay of serum troponin T at 72 hours ) , inotrope score ( calculated from the maximum dose of the individual inotropic agents administered in the first 3 days after surgery ) , acute kidney injury , duration of stay in the intensive care unit and hospital , distance on the 6-minute walk test , and quality of life .