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Last Updated: Sep 2009
What is Sleep Apnea?
Another option is  continuous positive airway pressure, which involves wearing a mask over the nose and mouth during sleep; this treatment keeps  the airway open by forcing air into the nasal passages. A different type of sleep apnea, called central sleep apnea, is  believed to be caused by an abnormality in the brain's regulation of breathing during sleep.

Regardless of type, the individual with sleep apnea is rarely aware of having difficulty breathing, even upon awakening.  Sleep apnea is recognized as a problem by others witnessing the individual during episodes or is suspected because of its  effects on the body (sequelae). Symptoms may be present for years, even decades without identification, during which time the  sufferer may become conditioned to the daytime sleepiness and fatigue associated with significant levels of sleep  disturbance. The definitive diagnosis of sleep apnea is made by polysomnography.
Sleep Apnea are episodes of interrupted breathing during sleep. Obstructive sleep apnea is a common disorder in which relaxation  of muscles in the throat repeatedly close off the airway during sleep; the person wakes just enough to take a gasping breath.  This process is repeated many times during sleep and usually is not remembered the next day. Those suffering from severe  obstructive sleep apnea typically complain of sleepiness, irritability, forgetfulness, and difficulty in concentrating. They  may have difficulties in their occupational or social lives and be prone to motor vehicle accidents.

Most people with obstructive sleep apnea tend to be obese and snore loudly. The disorder has been medically linked to  hypertension , which in turn puts people at greater risk of heart failure and stroke. Weight reduction in persons who are  overweight is an important factor in effective treatment. Alcoholic drinks near bedtime and sleeping pills should be avoided.  Sometimes obstructive sleep apnea can be treated by surgically correcting the narrowing of the airway.
Sleep Apnea
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