www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

Health
Women who smoke risk having seizures: study
2009-Nov-27 09:03:22

NEW YORK - Women who smoke may have a higher risk of developing seizures than non-smokers do, a new study suggests.

Researchers found that among more than 100,000 U.S. women in a long-running health study, current smokers were between two and three times more likely than non-smokers to suffer a seizure over 16 years.

Current smokers did not clearly show a higher risk of developing epilepsy, a disorder marked by recurrent seizures that are not provoked by a specific cause, such as a reaction to a drug.

However, epilepsy risk was somewhat elevated among former smokers, who had a 46 percent higher risk than women who had never smoked.

Dr. Barbara Dworetzky and colleagues at Harvard Medical School and Brigham & Women's Hospital in Boston report the findings in the journal Epilepsia.

Seizures arise from an episode of abnormal electrical activity in the brain -- with symptoms ranging from a brief staring "spell" or change in vision or sensations in the skin to convulsions and loss of consciousness. Epilepsy is diagnosed when a person suffers at least two unprovoked seizures.

In some cases, seizures and epilepsy have an identifiable cause, such as head trauma or brain damage from a stroke. But more often, no specific cause can be found.

Little is known about how seizures can be prevented, according to Dworetzky's team, but if the current findings are correct, avoiding smoking may be one way.

The idea that smoking could be a risk factor does have physiological evidence to back it up, the researchers point out. High levels of nicotine, for instance, have been found to trigger convulsions in both animals and humans.

Smoking also diminishes the oxygen supply to body tissues and, via the stimulating effects of nicotine, can trigger sleep problems, both of which may contribute to seizures.

Dworetzky and her colleagues based their findings on data from the Nurses' Health Study II, which began following more than 116,000 U.S. nurses between the ages of 25 and 42 in 1989. Over 16 years, 95 women suffered a seizure, and 151 were newly diagnosed with epilepsy.

Smokers were at greater risk of having an isolated seizure than non-smokers, even when other risk factors, including history of stroke, were taken into account.

Research has suggested that, as with nicotine, high alcohol or caffeine intake may also contribute to seizures. But in this study, women's drinking and caffeine habits were unrelated to the risks of seizure or epilepsy.

"Because there is little knowledge of modifiable risk factors for seizures or epilepsy," Dworetzky and her colleagues conclude, "more prospective studies are needed to find ways to possibly prevent their occurrence."

[Jump to ]
Nation | Biz | Comment | World | Celebrity | Odds | Sports | Travel | Health
ChinaDaily Mobile News
m.chinadaily.com.cn
To subscribe to China Daily, call 010-64918763 or email to circu@chinadaily.com.cn
主站蜘蛛池模板: 欧美色视频日本片免费高清 | 看片网站在线 | 国产精品亚洲欧美日韩久久 | 成人福利网站在线看视频 | 国产精品毛片久久久久久久 | 久久99九九精品免费 | 91视频免费播放 | www中文字幕 | 日韩色视频一区二区三区亚洲 | 久久精品视频2 | 在线精品亚洲欧洲第一页 | 国产精品一区久久 | jizzjizz成熟丰满舒服 | 欧美一级在线视频 | 国产精品亚洲二区在线 | 国产原创一区二区 | 一级毛片国产 | 成人午夜在线观看国产 | 一级特黄牲大片免费视频 | 精品国产91久久久久久久 | 国产欧美日韩综合精品一区二区 | 成年美女黄网站色大 | 欧美日韩一级黄色片 | 在线精品国产三级 | 久久午夜影视 | 国产一区二区影院 | 免费人成黄页在线观看视频国产 | 国产91精品露脸国语对白 | 日本大臿亚洲香蕉大片 | 亚洲成人免费视频 | 精品欧美一区二区三区免费观看 | 亚洲天堂网在线观看 | 国产亚洲精品国产一区 | 成年黄色网址 | 手机看片1024精品国产 | 成人在线中文字幕 | 亚洲国产成人久久一区久久 | 加勒比一区二区 | 欧美一级精品高清在线观看 | 国产精品高清一区二区 | 在线观看亚洲免费视频 |