Abstract:Objective To investigate the clinical effect of Dexmedetomidine in elderly patients with cardiac surgery. Method With randomized controlled trial, the elderly patients who underwent cardiac surgeries from July 2015 to June 2017 in our hospital were divided into experimental group and control group. Dexmedetomidine, Remifentanil and Propofol were used in the experimental group for anesthesia while only Remifentanil and Propofol were used in the control group. Intraoperative conditions, surgical effects and the use of narcotic drugs of the two groups were compared. Result The dosage and infusion speed of Remifentanil and Propofol in the experimental group were lower than those in the control group. The systolic pressure, diastolic pressure and mean pressure in the experimental group were higher than those in the control group while the heart rate was lower. Conclusion Combined usage of Dexmedetomidine in anesthesia for patients with cardiac surgery can make the hemodynamic performance more stable to protect the myocardium and reduce the dosage of Remifentanil and Propofol and the side effects of the anesthetic drugs, which has a positive significance for postoperative rehabilitation of patients.