[Central sleep apnea syndrome and Cheyne-Stokes respiration]

This overview discusses pathogenesis, clinical presentation, prognostic implications and therapy of central sleep apnea with special reference to Cheyne-Stokes-Respiration or periodic breathing. In contrast to obstructive sleep apnea due to upper airway collapse during sleep, central sleep apnea (CSA) is mainly due to an instability of the breathing control system. Causes of central sleep apnea include alveolar hypoventilation disorders, heart failure, neurologic and autonomic disorders and idiopathic forms of CSA. Patients with idiopathic CSA often complain of insomnia and awakening during sleep but may also suffer from daytime sleepiness. Cheyne-Stokes-Respiration or peridic breathing is often associated with heart failure and neurological disorders especially those involving the brainstem. In heart failure periodic breathing has enormous prognostic implications. Treatment options for central sleep apnea are oxygen supplementation, medical therapy (i.e. acetazolamide) and CPAP. For patients with central sleep apnoea associated with alveolar hypoventilation nasal ventilation is treatment of choice. Newer nasal ventilation techniques (BiPAP, AutoSetCS) are under investigation for heart failure patients with Cheyne-Stokes-Respiration.