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HEALTH REPORT - Why Sleep Apnea Raises Risk of Stroke, Heart Attack

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This mask, which is hooked up to a motor, delivers constant air into the throat and lungs, making it impossible to experience sleep apnea.
This mask, which is hooked up to a motor, delivers constant air into the throat and lungs, making it impossible to experience sleep apnea.

This is the VOA Special English HEALTH REPORT.

(SOUND)

Loud snoring can be a problem -- and not just for other people trying to sleep with the noise. It can also be a sign of sleep apnea. People with this condition repeatedly stop breathing while they sleep, and may not even know it.

Doctor David Gross is a lung specialist at the National Rehabilitation Hospital of Washington.

DAVIS GROSS: "sleep apnea means that the airway, the upper airway, cuts off at night. So the person, while he's breathing normally in the daytime, when he goes to sleep, the muscles get all relaxed and cut off and this can happen over and over again, sixty to one hundred times an hour."

Most people who snore do not have sleep apnea. But doctors say most people with sleep apnea do snore. sleep apnea not only reduces sleep quality and makes people feel tired during the day. More and more studies show that it can also lead to strokes and heart attacks.

Dr. Michael Twery of the National Institutes of Health explains why.

MICHAEL TWERY: "Whenever we run out of enough air to breathe, it sends alerting signals to our minds. It raises the level of stress hormones. It tells our heart to work harder."

When a person stops breathing, oxygen levels in the blood decrease. This happens again and again with sleep apnea.

MICHAEL TWERY: "And it's constantly exposing us, night after night, to periods of insufficient oxygen. The level of oxygen in our blood will actually decrease to levels that would be considered a medical emergency."

Dr. Twery compares the effect of sleep apnea to racing a car engine for long periods of time.

MICHAEL TWERY: "Our heart becomes overworked and we become more vulnerable to heart attack."

And also strokes. Dr. Twery led a study of about nine thousand people who had sleep apnea but no history of heart disease. The researchers followed their progress for nine years.

MICHAEL TWERY: "They found that men can experience up to a three-fold increased risk of stroke, and that risk seemed to be well correlated with the severity of sleep apnea."

In other words, the more severe the sleep apnea, the greater the chance of a stroke.

The next step will involve sleep apnea patients who have already had a stroke or heart attack. Researchers will study whether patients can reduce the risk of a second one with a machine called a CPAP. CPAP is continuous positive airway pressure. It provides a continuous flow of air into the throat and lungs while the person sleeps.

sleep apnea seems to be more common in men than in women, and it becomes more common as people get older. The most common form is called obstructive sleep apnea. People who have it are often overweight or have it in their family, but it can affect anyone. In children, for example, enlarged tonsils in the throat can interfere with breathing as they sleep.

And that's the VOA Special English HEALTH REPORT. I'm Mario Ritter.

网友的学习评论(18条):
作者:孔霞
this is the first article that i can listen completely,i am very happy
说的很有道理,现实生活中十分常见!
作者:laojia
what is the sleep apnea meaning
作者:Webmaster
TO laojia: sleep apnea是睡眠窒息症
congratulation to "孔霞",you can listen it completely , I just can understand it about 60 percent of it at the first time. you are so great, hehehe. have a nice day !
作者:yoyoxue
为什么MP3我下载到电脑里 打不开呢
作者:menwei
I can understand it about 50%,come on
作者:summer
hold on , so happy i am not sleep apnea
作者:hunter
医院有这个检测项目,在医院睡一晚,可以查出打呼噜的窒息次数
作者:dong
Fortunately,I have no luod snoring when I am sleeping.
作者:崔培培
My husband makes loud snoring at night and I hope he does not have sleep apnea.
作者:joy
i also snore in recent time , i think it may result from my hard work !
作者:henry
i do not know whether i have sleep apnea.
作者:Jessie
I have heard about the sleep apnea. It's horrible diease.But we cann't know whether to snore, except from others.
作者:杨健俊
My uncle in law has sleep apnea and he has been saved many times by my auntie during sleep!
作者:杨健俊
My uncle in law has sleep apnea and he has been saved many times by my auntie during sleep!
作者:Gavin
I make lung snoring when I feel too tired. I do not have idea about wehter I have "sleep apnea", because I can not feel it.
作者:snowwolfljb
i wonder why this disease hadn't disappeared following the evolvement of human.
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