Abstract 2034: Clinical Significance of Sleep-disordered Breathing (SDB) in a Large Population of Japanese Patients: Efficacy of CPAP Therapy in SDB-associated Arrhythmias

Abstract

OBJECTIVES: The purpose of this study was to determine the relationship between Sleep-disordered breathing (SDB) and cardiovascular disorders in a large Japanese population, and to assess the efficacy of continuous positive airway pressure (CPAP) in the treatment of SDB-associated arrhythmias. BACKGROUND: SDB is associated with cardiovascular disorders, such as hypertension, ischemic heart disease, and arrhythmias, and CPAP is one of the effective treatments for SDB; however, this relationship and the efficacy of CPAP treatment in a large population of Japanese patients remain undefined. METHODS AND RESULTS: The study population comprised 1413 Japanese subjects (mean age: 56.6 years old, 1123 men and 290 women) who were divided into 2 groups: SDB group ( n = 1064, apnea-hypopnea index (AHI)≥20)and control group ( n = 349, AHI < 20) by polysomnography (PSG) analysis. In baseline characteristics, age (58.3±14.7vs.50.0±18.4, p <0.0001), gender (male: 88.4%vs.72.9%, p <0.0001), BMI (25.9±4.4vs.23.2±3.7, p <0.0001), hypertension (38.0%vs.19.3%, p <0.0001), diabetes (10.4%vs.5.2%, p =0.015), or hyperlipidemia (15.6%vs.9.3%, p =0.018) were significantly associated with SDB. PSG revealed predominant occurrence of paroxysmal atrial fibrillation (PAF: 108/1064 vs. 3/349, p=0.005), premature ventricular complex (PVC: 359/1064vs.17/349, p=0.0012) and pause (sinus arrest ≥2 sec: 172/859vs.6/349, p=0.002) in SDB group. In the SDB group, 291 patients underwent CPAP titration and were then re-evaluated. CPAP therapy significantly reduced the occurrences of PAF (59/291vs.2/291, p=0.005), sinus bradycardia (18/291vs.0/291, p=0.002), and sinus pause (26/291 vs. 4/291, p=0.016). CONCLUSIONS: The results of this study provide a significant relationship between SDB and several cardiac disorders, and efficacy of CPAP in preventing SDB-associated arrhythmias in a large population of Japanese patients. Effect of CPAP on the arryhthmic events in patients with SAS during PSG recording