Abstract
Aim. The aim of this study was to review the effect of music as a non-invasive, non-pharmacological, inexpensive method with no side effects, on people with heart disease
Background. Heart disease is a common disease with considerable annual mortality. This review study investigates studies to bring a comprehensive view about the effect of music therapy on recovery of people with heart disease.
Method. This study was a narrative review in which studies in Persian and English language were searched out in databases/ search engines Magiran, SID, IranMedex, Pubmed, Scopus, and Google Scholar using the keywords music therapy, heart failure, acute coronary syndrome, hypertension, hypertension, heart surgery and open heart surgery. Inclusion criteria included articles being published in Persian or English language that examined the effect of music on recovery of people with heart disease. There was no time limit for articles under review. Exclusion criteria included articles that their full text were not accessible.
Findings. Out of 24 articles, the most of them (10 articles) examined the effect of music on hypertensive patients and on vital signs in heart patients (8 articles). The results showed that the effect of music on the recovery of heart patients included increasing the percentage of oxyhemoglobin saturation, relieving pain, reducing anxiety and depression, improving sleep quality and reducing fatigue. The music had no effect on mean arterial pressure and respiration. There were conflicting results regarding the effect of music on blood pressure and heart rate.
Conclusion. Considering the easy and cost-free application of this method, it is recommended that the health care team and especially nurses use this non-invasive method in the care of people with heart disease.

Abstract
Aim. This study aimed to examine the effect of implementing a risk management program on pharmaceutical calculation skills of nurses in cardiac care units.
Background. Patient safety and the early detection of medication errors are indicators of the quality of care. Risk management, through a systems-based approach, is an important strategy for preventing medication errors and harm to patients.
Method. This was a semi-experimental study. The study population was staff nurses working in the cardiac care units of Milad Hospital in Isfahan. Sixty nurses working in cardiac care units were selected based on inclusion criteria using a convenience sampling method, and they were randomly assigned to experimental and control groups. The intervention group participated in a risk management program delivered in eight 2-hour sessions, two sessions per week. The control group received the hospital training program. Data collection instruments included demographic form and nurses’ pharmaceutical calculation skills questionnaire, which were completed at the beginning and two weeks after the study. Data were analyzed in SPSS 21.
Findings. Before the study, there were no statistical significant differences between the two groups in pharmaceutical calculation skills, interest, ability, need for training, ease of pharmaceutical calculation skills, and medication errors. The mean score of the pharmaceutical calculation skills was in the “good” level. After the study, in the intervention group the nurses’ pharmaceutical calculation skills, ease of calculations, and ability increased significantly (p≤0.0001), whereas there was no significant change in the control group. After the study, the difference in pharmaceutical calculation skills between the intervention and control groups was significant (p≤0.0001).
Conclusion. Implementation of the risk management program significantly enhances nurses’ pharmaceutical calculation skills and is suggested as a strategy for promoting safe medication administration by nurses and achieving high-quality nursing care.