Abdullatef Ghazal - Resident, Isfahan Cardiovascular Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
Farshad Roghani - Associate Professor, Isfahan Cardiovascular Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
Masoumeh Sadeghi - Associate Professor, Cardiac Rehabilitation Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
Babak Amra - Associate Professor, Department of Pulmonology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
Mohammad Kermani-Alghoraishi - Resident, Hypertension Research Center, Isfahan Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran

BACKGROUND: Obstructive sleep apnea syndrome (OSAS) is a highly prevalent sleep-related disorder that is associated with increased risk of hypertension (HTN) and coronary heart disease. This study aimed to evaluate the correlation between the OSAS and coronary artery disease (CAD) severity. METHODS: The cross-sectional study was conducted from September ۲۰۱۲ to December ۲۰۱۳. We enrolled ۱۲۷ patients with chronic stable angina who were referred for coronary angiographic studies in Shahid Chamran and Nour Hospitals in Isfahan, Iran. The Berlin questionnaire (BQ) was used for estimate the probability of OSAS in patients as a low or high probability. Demographic characteristics and metabolic risk factors including diabetes mellitus, HTN, obesity, and smoking also were recorded. The severity of CAD was assessed and compared based on the Gensini score with Mann–Whitney U statistical test. Independent t-test for continuous variables and chi-square test for categorical variables were used. RESULTS: Totally, ۶۵.۴% of subjects were considered as high and ۳۴.۶% as low probability for OSAS, which ۸۱.۱% of them had CAD. There was a significant difference between body mass index, systolic blood pressure, diastolic blood pressure, and ischemic heart disease drug consumption with OSAS probability (P < ۰.۰۵۰۰). CAD was accompanied by OSAS significantly (P = ۰.۰۲۶۰). The Gensini score was significantly higher in patients with high OSAS probability (۱۰۰.۴ ± ۶۹.۱ vs. ۶۵.۳ ± ۶۸.۹; P = ۰.۰۰۳۰). OSAS also increase odds of CAD based on regression analysis (odds ratio, ۹۵% confidence interval = ۲.۷). CONCLUSION: This study indicates that more severe CAD is associated with high OSAS probability identified by BQ.   

Coronary Artery Disease, Obstructive Sleep Apnea Syndrome, Berlin Questionnaire