Abstract
Aim. This study aimed to examine the effects of preoperative preparation of patients and family caregivers on outcomes after coronary artery bypass graft surgery (CABG).
Background. Preoperative preparation can improve patients’ experience of surgery and hospitalization. However, there is limited data about how preoperative preparation affects postoperative outcomes following CABG.
Method. This non-randomized clinical trial was conducted on ninety pairs of patient/ caregiver in the time period from July to November 2018. The participants were purposively selected and non-randomly allocated to either control or experimental group. The intervention was performed one day after admission and the day before CABG in the form of an educational video, an intensive care unit tour, and an educational booklet. In both groups, on the third day after surgery, patients' delirium was assessed in the ICU and family caregivers were asked to complete a family satisfaction questionnaire. Patients and their family caregivers in both groups completed a hospital anxiety and depression questionnaire (HADS) on the first and seventh days after surgery and before discharge. Data were analyzed in SPSS version 16.0 using descriptive and inferential statistics. 
Findings. After intervention, the mean score of patients’ anxiety and depression in the intervention group was significantly less than the control group (P=0.03). After intervention, the mean score of anxiety and depression among family caregivers in the control and experimental groups were not significantly different (P=0.11). Family caregivers’ satisfaction of experimental group was significantly higher than the control group in both healthcare providers’ performance dimension (P=0.01) and comfort dimension (P=0.027). Moreover, the groups did not significantly differ from each other regarding delirium incidence (P=0.6) and length of stay in the intensive care unit (P=0.21).
Conclusion. Considering that the preparation of the patient and family caregiver on the day before CABG can reduce patients' anxiety and depression and increase the satisfaction of the family caregiver, it is recommended to use this intervention for patients and family caregivers before CABG.

Abstract
Aim. The aim of this study was to examine the effect of cognitive-behavioral therapy on depression, anxiety, and stress in patients after coronary artery bypass graft surgery.
Background. Coronary artery bypass graft surgery, like other surgeries, is stressful for the patient, and depression, anxiety, and stress are common important disorders in these patients. In this regard, one of the effective psychotherapy methods to reduce negative psychological factors and prevent recurrence of the disease is cognitive-behavioral therapy.
Method. The design of the present study was quasi-experimental with a pretest-posttest design with a control group. The statistical population of the study included all patients after coronary artery bypass graft surgery in selected AJA hospital in Tehran, Iran. Based on convenience sampling, 30 people were selected and randomly allocated to experimental (n=15) and control (n=15) group. They responded to the Depression, Anxiety and Stress Questionnaire (DASS-21) and underwent 15 sessions of psychotherapy. The experimental and control group were homogeneous in terms of age, education, as well as duration of hospital stay and absence of other chronic diseases. The univariate analysis of covariance was performed using SPSS-23.
Findings. The results showed that depression, anxiety and stress of the experimental group significantly reduced in the post-test compared to those of control group.
Conclusion. In addition to medical interventions, cognitive-behavioral therapy can also be used for patients after coronary artery bypass graft surgery to reduce depression, anxiety and stress and prevent recurrence of the disease. Special attention can also be paid to the psychological factors that cause or exacerbate cardiovascular disease.

Abstract
Aim. This study aimed to compare the effect of Adaptive Support Ventilation (ASV) and Synchronized Intermittent Mandatory Ventilation-Pressure Support (SIMV-PS) modes on consequence of weaning off patients from mechanical ventilator after coronary artery bypass surgery
Background. The ventilation mode used for respiratory support in patients after coronary artery bypass graft surgery is very important. In addition to avoiding pressure on patient's sternotomy incision, the ventilation mode should also provide the possibility of rapid weaning of patient to avoid complications caused by long-term ventilation.
Method. In a semi-experimental study, 26 patients were ventilated with ASV as the experimental group and 26 patients were ventilated with SIMV-PS mode as the control group after coronary artery bypass graft surgery in Rajaie Cardiovascular Medical and Research Center, Tehran, Iran. Mechanical ventilation time and endotracheal tube removal time, hemodynamic variables, and arterial blood gas analysis were compared between the two groups. Data were analyzed using an independent t-test, repeated measures ANOVA and chi-square.
Findings. Out of 52 patients, 36 (69.2 percent) were male and 16 (30.8 percent) were female. The mean time for the endotracheal tube removal was 89.42±33.83 minutes in the experimental group and 101.53±44.91 minutes in control group, which did not have a statistically significant difference (p=0.843). The mean duration of mechanical ventilation of patients in the experimental group was 483.84±158.153 minutes and in the control group, it was 541.92±257.81 minutes, which were not statistically different (p=0.332).
Conclusion. The use of ASV mode for mechanical ventilation after coronary artery bypass graft did not affect reducing the duration of mechanical ventilation and the time of endotracheal tube removal compared to SIMV-PS mode. Therefore, the use of ASV mode for respiratory support of patients undergoing coronary artery bypass surgery should be considered according to the patient's condition and the nurses' expertise.