Printer friendly dictionary, encyclopedia and thesaurus - the free dictionary 4,295,092,582 visitors served. Forum join the word of the day mailing list for webmasters thefreedictionary google bing? generic viagra online no prescription Word / article starts with ends with text dictionary/thesaurus medicaldictionary legaldictionary financialdictionary acronyms  idioms encyclopedia wikipediaencyclopedia? significance bathtub viagra commercials Sleep apnea (redirected from obstructive sleep apnea syndrome)    also found in: dictionary/thesaurus, acronyms, encyclopedia, wikipedia 0. cheap viagra pills 01 sec. Sleep apnea definition sleep apnea is a condition in which breathing stops for more than ten seconds during sleep. viagra cost Sleep apnea is a major, though often unrecognized, cause of daytime sleepiness. It can have serious negative effects on a person's quality of life, and is thought to be considerably underdiagnosed in the united states. Description a sleeping person normally breathes continuouusly and uninterruptedly throughout the night. A person with sleep apnea, however, has frequent episodes (up to 400-500 per night) in which he or she stops breathing. This interruption of breathing is called "apnea. " breathing usually stops for about 30 seconds; then the person usually startles awake with a loud snort and begins to breathe again, gradually falling back to slep. buy generic viagra online There are two forms of sleep apnea. In obstructive sleep apnea (osa), breathing stops because tissue in the throat closes off the airway. In central sleep apnea, (csa), the brain centers responsible for breathing fail to send messages to the breathing muscles. Osa is much more common than csa. viagra online without prescription It is thought that about 1-10% of adults are affected by osa; only about one tenth of that number have csa. best generic viagra pharmacies Osa can affect people of any age and of either sex, but it is most common in middle-aged, somewhat overweight men, especially those who use alcohol. Causes and symptoms obstructive sleep apnea obstructive sleep apnea occurs when part of the airway is closed off (usually at the back of the throat) while a person is trying to inhale during sleep. People whose airways are slightly narrower than average are more likely to be affected by osa. Obesity, especially obesity in the neck, can increase the risk of developing osa, because the fat tissue tends to narrow the airway. generic viagra without subscription In some people.