Background: Regarding high prevalence of sleep disorders among coronary care unit patients and the impact of proper sleep on health and improvement of patients, the aim of this study is to define the effect of nursing interventions on quality of sleep among patients in coronary care unit.

  Methods: This clinical trial study was accomplished by participation of 196 patients in CCUs of Ekbatan Hospital of Hamadan city via convenience sampling methods and then they were divided in Control and Intervention group randomly. At first, the quality of sleep in control group which received routine nursing cares was measured in the morning of the third day by SMHSQ questionnaires. After preparation of environment and defined nursing intervention for in-patients sleep were taught to the nurses. In morning of the third day of hospitalization, the patients’ quality of sleep of intervention group was measured by SMHSQ questionnaires. Then, the patients’ quality of sleep of control and intervention groups was compared.

  Result: Results showed the mean score (standard deviation) of sleep quality in control group and intervention groups was 26.58 (6.64) and 17.87 (5.36) respectively. univariate analysis of variance test indicated a statistically significant improvement in sleep quality in intervention group than that of control group (p=0.031).

  Conclusion: Using appropriate nursing interventions for sleep and adequate rest and preparing appropriate physical conditions could have a major role in improving quality of sleep of patients in coronary care units.