Comparison of the Effects of Remimazolam Besylate and Propofol Sedation on Hemodynamic for Coronary Artery Bypass Graft Patients：a Prospective, Single Blinded, Randomized Controlled Trial

In the immediate postoperative period following cardiac surgery, many patients require short-term sedation until cardiovascular and respiratory stability has been achieved and weaning from artificial ventilation can be started. For these patients, current guideline recommended propofol over benzodiazepine, mainly because of the short elimination half life of propofol. However, hypotension, a very common side effect of propofol, may impose restrictions on its use in some cardiac surgery patients. Remimazolam besylate is a novel, ultra-short-acting benzodiazepine that undergoes organ-independent metabolism by tissue esterases into an inactive metabolite. In other words, remimazolam has both the property of quick offset of effect like propofol and the stable hemodynamic effect like midazolam, making it favorable for use as a sedative in cardiac surgery patients. The aim of this study is to evaluate the hemodynamic effect of remimazolam besylate versus propofol in patients undergoing cardiac surgery.