pSleep disorders represent a major portion of the chief complaints seen by pulmonologists and other physicians. Sleep apnea and hypopnea syndrome for example, are common disorders with significant adverse health consequences. Sleep apnea is associated with increased cardiovascular mortality, impaired quality of life and increased motor vehicle accidents. In addition, sleep apnea often co-exists with other chronic conditions including obesity, the metabolic syndrome, and tobacco use disorder. Patients with sleep-related conditions often present with non-specific complaints that require a broad and detailed knowledge of the wide range of sleep disorders. pp ppIn Essentials of Sleep Medicine An Approach for Clinical Pulmonology, a concise, evidence-based review of sleep medicine for the pulmonologist is presented. Providing a focused, scientific basis for the effects of sleep on human physiology, especially cardiac and respiratory physiology, chapters also outline a differential diagnosis