Background: Patients undergoing cardiac surgeries are at high risk of developing delirium. Aims and objectives: The present study aimed to determine the effects of multimedia education on postoperative delirium in patients undergoing a coronary artery bypass graft. Design: This study was a randomized clinical trial. Methods: In this study, 110 patients undergoing a coronary artery bypass graft were assigned to two groups, control and intervention. Patients in the intervention group received multimedia education, and those in the control group received routine training. The inclusion criteria were experiencing the coronary artery bypass graft for the first time and non-development of post-operative cardiogenic shock or myocardial rupture. After measuring the level of consciousness, patients were examined in terms of delirium using the confusion assessment method for the ICU scale twice a day from admission to discharge from the ICU. The data were statistically analysed using χ 2 test and Fisher 0 s exact test. Results: Patients of both groups were matched in terms of demographics. The highest incidence of delirium was observed on the first day after surgery in the intervention group (14.5%) and in the morning of the second day after surgery (29.1%) in the control group. Moreover, there was a significant difference between the two groups in the incidence of delirium in the morning of the second, third, and fourth days after surgery as it was higher in the control group over these days. Conclusion: Considering the lower incidence of post-operative delirium in patients who experienced multimedia education rather than control group, the use of this non-pharmaceutical method is recommended to prevent delirium in such patients.

Introduction: Anxiety is one of the prevalent events before and after surgery which occurs in patients due to the waiting time for heart surgery, hospitalization, fear of death, and in general the fear of unknowns. This study was conducted to investigate and compare the effect of multimedia education on anxiety before and after surgery in patients undergoing coronary artery bypass graft surgery. Methods: In this randomized clinical trial where the data collector and the data analyzer were blinded, 110 patients undergoing coronary artery bypass graft surgery in 2016 were divided into two experimental and control groups (each group of 55) using quadruple blocking. For patients in experimental group, training through multimedia method was done and for the control group routine training was done. Patients' anxiety was evaluated using Spilberger's State-Trait Anxiety Inventory 5-7 days before surgery, and the day before surgery and the post-operative after extubation. Data was analyzed using descriptive and analytical statistics (Chi-square, and repeated measures analysis of variance). Results: Both intervention and control groups were homogeneous in terms of demographic variables (P<0.05). There was no significant difference between the mean of State-Trait Anxiety scores between two groups at three times (P<0.05). The mean anxiety score of patients over time was significantly different, so the State, Trait, and total anxiety scores decreased significantly in the time of extubation compared to the previous two stages (P<0.05). Conclusion: Since, by using educational interventions the anxiety of patients was reduced compared to the preoperative situation, preoperative educational interventions are recommended to reduce the anxiety of these patients.