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What is OSA
(Obstructive Sleep Apnea)?
Sleep apnea is a
serious, potentially life-threatening condition that is far more common
than generally understood. First described in 1965, sleep apnea is a
breathing disorder characterized by brief interruptions of breathing
during sleep. It owes its name to a Greek word, apnea, meaning "want of
breath." There are two types of sleep apnea: central and obstructive.
Central sleep apnea, which is less common, occurs when the brain fails to
send the appropriate signals to the breathing muscles to initiate
respirations. Obstructive sleep apnea is far more common and occurs when
air cannot flow into or out of the person's nose or mouth although efforts
to breathe continue. In a given night, the number of involuntary breathing
pauses or "apneatic events" may be as high as 20 to 60 or more per hour.
These breathing pauses are almost always accompanied by snoring between
apnea episodes, although not everyone who snores has this condition. Sleep
apnea can also be characterized by choking sensations. The frequent
interruptions of deep, restorative sleep often leads to excessive daytime
sleepiness and may be associated with an early morning headache. Early
recognition and treatment of sleep apnea is important because it may be
associated with irregular heartbeat, high blood pressure, heart attack,
and stroke.
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