Patients with obstructive sleep apnea (OSA) have an increased risk of cardiovascular morbidity. This study aimed to determine circulating carbon monoxide (CO) levels, which have been suggested to be a marker of cardiovascular risk in patients with OSA.
Department of Internal Medicine and Clinical Immunology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.