This study was criticized by not considering some existing evidences, such as low insulin dose administered in a single moment and not maintained the intervention in the postoperative period.32 A meta-analysis published in 2004, which included 11 studies evaluating the GIK administered in the CABG postoperatively or in the valve replacement relating to 468 patients, estimated an 11.4% increment in the CI of patients who received GIK infusion with a decrease in the atrial fibrillation in the postoperative period. Here, INS is linked to atrial fibrillation.