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Upper Airway Resistance Syndrome
American Journal of Respiratory and Critical Care Medicine
Upper airway resistance syndrome (UARS) is defined by excessive daytime sleepiness and tiredness, and is associated with increased breathing effort. Its polygraphic features involve progressive increases in esophageal pressure (Pes), terminated by arousal (AR) as defined by the American Sleep Disorders Association (ASDA). With the arousal there is an abrupt decrease in Pes, called Pes reversal. However, Pes reversal can be seen without the presence of an AR. We performed spectral analysis ondoi:10.1164/ajrccm.162.2.9901026 pmid:10934061 fatcat:aimipktckzh3xcy2m7qoblondi