e360 digest


26 Jun 2012: Elevated Ozone Levels
Trigger Heart Risks for Healthy Adults

Exposure to ozone at levels sometimes present in the world’s most polluted cities can trigger potentially dangerous changes to human cardiovascular systems, according to a new study. In a series of tests conducted on 23 healthy adults, scientists found evidence of cardiac inflammation and heart rhythm disturbance after exposure to air containing ozone at 0.3 parts per million for two hours — about the same dose they would receive if exposed to ozone levels exceeding the U.S. standard of 0.075 parts per million over eight hours. According to the findings, published in the journal Circulation, the blood levels of several inflammatory agents increased — more than doubling in some cases — after ozone exposure. This finding “caught us by surprise,” said Robert Devlin, a toxicologist with the U.S. Environmental Protection Agency and lead author of the study. “We think it’s one of the more important and significant findings.” According to researchers, ozone exposure caused a decrease in lung function and subtle changes in heart rate variability. Heavily polluted cities such as Beijing and Mexico City often have extremely high ozone levels, and ozone in U.S. cities such as Los Angeles and Houston can reach levels equal to those used in the experiment.


Yale
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
.

SEARCH e360



Donate to Yale Environment 360
Yale Environment 360 Newsletter


CONNECT


ABOUT

About e360
Contact
Submission Guidelines
Reprints

E360 en Español

Universia partnership
Yale Environment 360 articles are now available in Spanish and Portuguese on Universia, the online educational network.
Visit the site.


DEPARTMENTS

Opinion
Reports
Analysis
Interviews
Forums
e360 Digest
Podcasts
Video Reports

TOPICS

Biodiversity
Business & Innovation
Climate
Energy
Forests
Oceans
Policy & Politics
Pollution & Health
Science & Technology
Sustainability
Urbanization
Water

REGIONS

Antarctica and the Arctic
Africa
Asia
Australia
Central & South America
Europe
Middle East
North America

e360 VIDEO

“video
Tribal people and ranchers join together to stop a project that would haul coal across their Montana land.
Watch the video.

e360 MOBILE

Mobile
The latest
from Yale
Environment 360
is now available for mobile devices at e360.yale.edu/mobile.

e360 VIDEO

“Battle
The 2015 Yale e360 Video Contest winner documents a Northeastern town's bitter battle over a wind farm.
Watch the video.

e360 VIDEO

“Alaska
A 2015 Yale e360 Video Contest winner captures stunning images of wild salmon runs in Alaska.
Watch the video.

e360 VIDEO

Food waste
An e360 video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs.
Watch the video.

e360 VIDEO

Colorado wildfires
An e360 video goes onto the front lines with Colorado firefighters confronting deadly blazes fueled by a hotter, drier climate.
Watch the video.

e360 SPECIAL REPORT

“Tainted
A three-part series Tainted Harvest looks at the soil pollution crisis in China, the threat it poses to the food supply, and the complexity of any cleanup.
Read the series.

OF INTEREST



Yale