朗阁首页 > 留学频道 > 留学资讯 > [双语]呼吸雾霾会加快动脉硬化引发中风

[双语]呼吸雾霾会加快动脉硬化引发中风

来源:网络 2013-05-02 编辑:PMC_ivy 雅思托福0元试学

备考资料免费领取

根据今日发表在《公共科学图书馆?医学》杂志上的研究,呼吸含大量颗粒物的(雾霾)空气可能会让你的动脉硬化速度加快。尽管每个人的动脉都会随着年龄增大而逐渐硬化,但密歇根大学公共卫生中心的流行病学家萨拉?阿达*的研究团队发现,空气中的细微颗粒污染物浓度升高与颈动脉内膜和中膜增厚加快有关。

  Breathing particulate-laden (aka smoggy) air may behardening your arteries faster than normal, according to research publishedtoday in PLOS Medicine. While everyones’ arteries harden gradually with age, ateam of researchers led by epidemiologist Sara Adar of the University ofMichigan School of Public Health discovered that higher concentrations of fineparticulate air pollution were linked to a faster thickening of the inner twolayers of the carotid artery。
  Because the carotid artery feeds blood to the neck, head, and brain, a narrowing or blockage there can trigger strokes. And general atherosclerosis, or hardening of the arteries, is a major risk factor for cardiovascular disease, heart attack, and heart failure。
  Past research has demonstrated that the rates of strokeand heart attack are higher in polluted areas, but experts haven’t been able topinpoint just how polluted air is raising peoples’risk for heart attack or stroke. This time, Adar’s team, along with JoelKaufman, professor of environmental and occupational health sciences andmedicine at the University of Washington, was able to directly measure carotidartery thickness and link it to air pollution data。
  The study involved 5,362 people between the ages of 45 and 84 living in six different cities that are part of the MESA AIR (Multi-Ethnic Study of Atherosclerosis and Air Pollution) research project, led by Joel Kaufman. Each participant underwent two carotid artery ultrasounds three years apart. These measurements were then correlated with data on fine particulate air pollution。
  While the artery walls of all participants increased by 14 micrometers per year, the arteries of those who were exposed to higher levels of fine particulate air pollution in their homes thickened faster than their neighbors in other parts of the city。
  Interestingly, the researchers also found the reverse effect to be true: reducing fine particulate air pollution levels slowed down atherosclerosis progression. Carotid artery measurements are considered by experts to be an indicator for arterial plaque and hardening throughout the body。
  根据今日发表在《公共科学图书馆•医学》杂志上的研究,呼吸含大量颗粒物的(雾霾)空气可能会让你的动脉硬化速度加快。尽管每个人的动脉都会随着年龄增大而逐渐硬化,但密歇根大学公共卫生中心的流行病学家萨拉•阿达*的研究团队发现,空气中的细微颗粒污染物浓度升高与颈动脉内膜和中膜增厚加快有关。
  由于颈动脉要向颈部、头部和大脑供血,颈动脉变窄或堵塞可能会引发中风。通常动脉硬化是冠心病、心脏病发作和心力衰竭的主要风险因素。
  以往的研究已经表明,在受污染地区中风和心脏病发作的几率更高,但还未能查明空气污染是如何*人们心脏病或中风发作的风险的。这次阿达带领的团队和华盛顿大学环境与职业健康科学和医学专业的教授乔尔•考夫曼联手合作,已经能够直接测量颈动脉厚度,并将其和空气污染数据联系起来。
  乔尔•考夫曼*的这一动脉硬化和空气污染多种族研究项目调查了居住在6个不同城市、年龄在4*到8*之间的5362个人。每个参与者隔三年都要做一次颈动脉超声波检查。研究人员把这些测量结果和细颗粒物空气污染的数据联系起来。
  尽管所有参与者的动脉壁每年都会增厚14微米,但那些家周边空气中细颗粒污染物水平更高的人动脉壁比住在同城其他地区的人增厚速度更快。
  有趣的是,研究人员还发现反之亦然:降低空气中的细颗粒污染物水平会减慢动脉硬化的速度。认为颈动脉的测量数据是动脉斑块和周身硬化的指示标志。
 
 
填写表单, 申请朗阁雅思托福免费试听课程

雾霾 中风 双语 动脉硬化
分享到:

热门雅思培训课程推荐

  • 适用人群
  • 词汇量1000
  • 词汇量1500
  • 词汇量2000以上
  • 词汇量6000以上
  • 开课时间
  • 热报中
  • 滚动开班
  • 即将开班
  • 热报中

获取验证码

立即获取

稍后有专业老师给你回电,请保持电话畅通
沪ICP备 17003234 号 图书经营许可证:第A7651号 版权所有:上海朗阁教育科技股份有限公司 Copyright 2005 LONGRE EDUCATION GROUP All Rights Reserved