日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

 
 
 

Rethinking 'good' cholesterol; PSA test debate

2012-06-06 16:59

 

Get Flash Player

Download

This is the VOA Special English Health Report.

A study has raised questions about a widely held belief involving cholesterol. The belief is that high levels of so-called good cholesterol in the blood can reduce the risk of a heart attack.

The medical name for "good" cholesterol is high-density lipoprotein, or HDL. Doctors commonly believe it reduces the risk of heart attack by removing fatty deposits that can block the flow of blood in the arteries of the heart.

Rethinking 'good' cholesterol; PSA test debate

But Dr. Sekar Kathiresan at Massachusetts General Hospital in Boston says the effects of high HDL have never been proven. He says the new study that he and other researchers did suggests that HDL cholesterol does not affect the risk of heart attack.

SEKAR KATHIRESAN: "This has been the major assumption over the last 30 years, that if you raise HDL cholesterol, the risk for heart disease will be lowered. And I think we have now broken that assumption, broken that link using this gene variant."

The researchers say about four percent of people have a genetic change that gives them a naturally high level of HDL. The study found that those who were genetically "programmed" to have higher HDL levels were just as likely to suffer heart attacks as those who were not.

A second analysis looked at 14 gene variants that increase good cholesterol. Dr. Kathiresan says people with the most variants had no more protection against heart attacks than anyone else.

But he says there is no dispute about the effects of low-density lipoprotein, or LDL. LDL, the so-called bad cholesterol, causes a buildup of fatty substances inside arteries and increases the risk of heart attack.

Dr. Kathiresan and his colleagues published their findings in the Lancet medical journal.

Another widely held medical belief has also come into question recently. For years, men over the age of 40 have been told to get a simple blood test to see if they have prostate cancer. Now, experts on a government committee are advising them not to. Dr. Virginia Moyer heads the United States Preventive Services Task Force.

VIRGINIA MOYER: "Close to two-thirds of older men have prostate cancer and yet the huge majority of them never have a problem from it in their lifetime."

The task force examined two large studies before deciding that treating the cancer found by the PSA test can do more harm than good. Effects of the treatment can include a loss of sexual ability and bladder control, as well as other problems including heart attacks.

Some experts support the findings of the task force, but others disagree. Urologist Deepak Kapoor says in about 20 years of PSA testing, death rates for prostate cancer have dropped by 38 percent.

And that's the VOA Special English Health Report. I'm Steve Ember.

high-density lipoprotein: 高密度脂蛋白

Related stories:

純素食有風險 不妨“彈性素食”

Antibody could reverse diabetes

Study: cutting salt might increase heart risks

Cholesterol-lowering foods may prove healthier

(來源:VOA 編輯:旭燕)

 
中國日報網英語點津版權說明:凡注明來源為“中國日報網英語點津:XXX(署名)”的原創作品,除與中國日報網簽署英語點津內容授權協議的網站外,其他任何網站或單位未經允許不得非法盜鏈、轉載和使用,違者必究。如需使用,請與010-84883561聯系;凡本網注明“來源:XXX(非英語點津)”的作品,均轉載自其它媒體,目的在于傳播更多信息,其他媒體如需轉載,請與稿件來源方聯系,如產生任何問題與本網無關;本網所發布的歌曲、電影片段,版權歸原作者所有,僅供學習與研究,如果侵權,請提供版權證明,以便盡快刪除。

中國日報網雙語新聞

掃描左側二維碼

添加Chinadaily_Mobile
你想看的我們這兒都有!

中國日報雙語手機報

點擊左側圖標查看訂閱方式

中國首份雙語手機報
學英語看資訊一個都不能少!

關注和訂閱

本文相關閱讀
人氣排行
熱搜詞
 
 
精華欄目
 

閱讀

詞匯

視聽

翻譯

口語

合作

 

關于我們 | 聯系方式 | 招聘信息

Copyright by chinadaily.com.cn. All rights reserved. None of this material may be used for any commercial or public use. Reproduction in whole or in part without permission is prohibited. 版權聲明:本網站所刊登的中國日報網英語點津內容,版權屬中國日報網所有,未經協議授權,禁止下載使用。 歡迎愿意與本網站合作的單位或個人與我們聯系。

電話:8610-84883645

傳真:8610-84883500

Email: [email protected]

主站蜘蛛池模板: 凹凸日日摸日日碰夜夜爽孕妇 | 亚洲免费在线 | 久久精品二区亚洲w码 | 国产福利在线看 | 免费高清seyeye在线视频观看 | 色搞搞 | 日韩精品第二页 | 免费又粗又硬进去好爽A片视频 | 色色成人网 | 国产精品极品美女在线观看免费 | 一级片视频网站 | 国产高清一区二区 | 狠狠干2020 | 欧美日日日| 精产国产伦理一二三区 | 亚洲精品国产网红在线 | 成人爽a毛片免费啪啪红桃视频 | 欧美人xx | 久久视频这里只有精品35 | 一级爱一级做a性视频 | 在线免费观看毛片 | 午夜视频国语 | 久草在在线| 台湾佬中文娱乐2222vvv | 久久3 | 亚欧视频在线观看 | 狠狠av| 清纯唯美综合网 | 日本黄页在线观看 | 欧美日韩中文国产一区发布 | 欧美性bbbbbxxxxxddd | 国产精品v在线播放观看 | 国产精品极品美女在线观看免费 | 99av涩导航| 成人亚洲一区二区色情无码潘金莲 | 国产福利免费在线观看 | 欧美亚洲另类在线 | 天天插天天狠天天透 | 一个看片免费视频www | 国产淫语对白在线视频 | 黄网站涩免费蜜桃网站 |