Coronary artery disease (CAD) is one of the common cardiovascular diseases, including myocardial infarction and unstable angina pectoris. Using the Global Burden of Disease statistical data analysis in 2020, Khan and other scholars found that the global prevalence of CAD is about 1,655 per 100,000 people, and the prevalence rate in Taiwan is about 1759 per 100,000 people, slightly higher than the global prevalence rate. Therefore, all countries in the world attach great importance to the prevention and treatment of CAD. In addition to common risk factors such as age, metabolic disease, smoking, and poor lifestyle habits such as insufficient physical activity, the literature indicates that sleep quality and sleep duration are also significantly associated with CAD. A 2011 meta-analysis by Francesco et al. pointed out that people who sleep less than 5 hours have a higher risk of CAD and are significantly associated with higher mortality rate. Patients with CAD who self-reported poor sleep quality and short sleep duration still had a high proportion after heart-related treatment. In 1993, Redeker tracked the related symptoms of patients after coronary artery bypass graft(CABG) and found that the sleep disturbance of patients did not improve, but increased. A systematic review of the literature by Liao et al. also found similar results. The sleep quality and sleep duration of patients after CABG can be improved over time, but a high proportion of patients still complain of sleep disturbance. Therefore, the influence of sleep disturbance in patients with CAD will persist, and studies have also suggested that persistent sleep disturbance will increase the readmission rate and mortality rate of patients with CAD. Therefore, it is very important to actively manage the sleep quality and sleep time of patients with CAD.
This study aims to investigate the effects of cardiac rehabilitation on sleep quality and sleep duration in patients after coronary artery bypass graft.