Navigation Links
Inhaling a Heart Attack: How Air Pollution Can Cause Heart Disease
Date:9/8/2009

University of Michigan tests show short-term exposure to fine particle air pollution can drive up high blood pressure, raise risk of heart attack

ANN ARBOR, Mich., Sept. 8 /PRNewswire-USNewswire/ -- It's well known that measures such as exercise, a healthy diet and not smoking can help reduce high blood pressure, but researchers at the University of Michigan Health System have determined the very air we breathe can be an invisible catalyst to heart disease.

Inhaling air pollution over just two hours caused a significant increase in diastolic blood pressure, the lower number on blood pressure readings, according to new U-M research.

The study findings appear in the current issue of Hypertension, a publication of the American Heart Association.

Nearly one in three Americans suffer from hypertension, a significant health problem that can lead to heart attack, heart failure, stroke, and other life-threatening problems.

"Although this increase in diastolic blood pressure may pose little health risk to healthy people, in people with underlying coronary artery disease this small increase may actually be able to a trigger heart attack or stroke," says Robert D. Brook, M.D., lead author and vascular medicine physician at the U-M Cardiovascular Center.

In the study, researchers hoped to identify which air pollutants are harmful and how the pollutants work to damage the cardiovascular system.

Eighty-three people in Ann Arbor and Toronto were involved in testing and breathed air pollution, concentrated by a mobile air quality research facility, that was similar to what would be found in an urban environment near a roadway.

"We looked at their blood vessels and then their responses before and after breathing high levels of air pollution," explains Robert Bard, M.S., overall research project manager.

Ozone gases, a well-known component of air pollution, were not the biggest culprit. Rather, small microscopic particles about a 10th of the diameter of a human hair caused the rise in blood pressure and impaired blood vessel function, tests showed. The blood pressure increase was rapid and occurred within two hours, while the impairment in blood vessel function occurred later but lasted as long as 24 hours.

It's believed these fine particles deposit deep into the lungs and certain components may gain entrance to the blood stream, or cause an inflammatory response throughout the body. There is also evidence that functions in the body's nervous system are also disrupted.

The research is the latest in the relatively new field of Environmental Cardiology which looks at the association between air pollution and heart disease. Brook says that at the very least the findings support efforts to maintain current ambient air quality standards set by the Environmental Protection Agency.

"It really bolsters and strengthens the importance of maintaining air quality for human health," says Brook.

There are practical ways to avoid exposure to high levels of air pollution, such as avoiding unnecessary travel or commutes and not exercising during rush hour, or near busy roadways, Brook says. In modern society, the burning of fossil fuels is the primary source for air pollution.

"If air pollution levels are forecasted to be high, those with heart disease, diabetes or lung disease should avoid unnecessary outdoor activity," he says.

Additional authors: Bruce Urch, University of Toronto; J. Timothy Dvonch, University of Michigan; Robert L. Bard, University of Michigan; Mary Speck, Gage Occupational and Environmental Health Unit, Toronto; Gerald Keeler, University of Michigan; Masako Morishita, University of Michigan; Frank J. Marsik, University of Michigan; Ali S. Kamal, University of Michigan; Niko Kaciroti, University of Michigan; Jack Harkema, School of Veterinary Medicine, Michigan State University, East Lansing, Mich.; Paul Corey, University of Toronto; Frances Silverman, University of Toronto; Diane R. Gold, Harvard Medical School; Greg Wellenius, Beth Israel Deaconess Medical Center, Boston; Murray A. Mittleman, Beth Israel; Sanjay Rajagopalan, Ohio State University, Columbus, Ohio; and Jeffrey R. Brook, Gage Occupational and Environmental Health Unit, Toronto.

Funding: U.S. Environmental Protection Agency, the National Institutes of Health General Clinical Research Center, and the Natural Resources Canada and Air Quality Health Effects Research Section.

Reference: Hypertension, Vol. 54, Issue 3, Sept. 1, 2009

Resources:

What's today's air quality?

http://airnow.gov/index.cfm?action=airnow.national

U-M Cardiovascular Center

http://www.med.umich.edu/cvc/


'/>"/>
SOURCE University of Michigan Health System
Copyright©2009 PR Newswire.
All rights reserved

Related medicine technology :

1. American University of Beirut Medical Team Successfully Performs First Artificial Heart Implant in Lebanon
2. Video: MADIT-CRT Trial Results Provide Clinical Evidence That Cardiac Resynchronization Therapy Significantly Slows Heart Failure Progression
3. Ochsner Replaces Heart Valve Without Open Heart Surgery
4. Atlanta-based Med Tech Company CardioMEMS Raises Additional Capital to Advance its CHAMPION Clinical Trial for its Wireless Sensor System for Heart Failure Monitoring
5. WorldHeart Receives US Clinical Study Approval for the Levacor(TM) VAD
6. Midwest Mobile Dog Heart Health Tour to Provide Free Heart Examinations
7. Injection Reverses Heart-Attack Damage
8. July 2009 Mayo Clinic Health Letter Highlights a Positive Outlook, Bells Palsy and Heart Valve Repair
9. St. Francis Surgeon Uses Tissue Regeneration Technology to Rebuild Patients Heart Structures
10. Leading Experts Endorse Biohearts Muscle Stem Cell MyoCell Therapy
11. New Therapy Found to Prevent Heart Failure
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/17/2017)... Jan. 17, 2017  From the company that brought a full ... years ago, comes a new line of companion animal pet first ... leader in equine first aid, has developed two sizes of small ... , Inc. Featuring a small and a large ... and rodeo family, is not a newcomer to working with small ...
(Date:1/17/2017)... 2017  OrthoAccel ® Technologies, Inc. announces that ... published "The Effect of Vibration on Molar Distalization," a ... S. Jay Bowman , this prospective, peer-reviewed clinical ... SoftPulse Technology ® speeds up molar distalization rates ... number of days to move the upper molars into ...
(Date:1/17/2017)... , Jan 17, 2017 Research and ... in Healthcare Industry 2016-2020" report to their offering. ... The global fluoropolymer market ... during the period 2016-2020. Global Fluoropolymer Market in ... market analysis with inputs from industry experts. The report covers the ...
Breaking Medicine Technology:
(Date:1/17/2017)... (PRWEB) , ... January 17, 2017 , ... SunView Software’s ... Award for Innovation of the Year. , Each year, Pink Elephant recognizes ... an innovative approach to address a specific business problem or opportunity. The award highlights ...
(Date:1/17/2017)... ... January 17, 2017 , ... Etymotic Research ... Association of Music Merchants (NAMM) winter trade show, Booth #2876, at the Anaheim ... has long been the gold standard for high-definition, in-ear earphones. This classic earphone ...
(Date:1/17/2017)... ... January 17, 2017 , ... Achieve TMS West, ... opening a new office in San Clemente, California this month. Achieve TMS West ... California, successfully treating individuals struggling with major depression. Depression impacts over 15 million ...
(Date:1/17/2017)... ... January 17, 2017 , ... Medic-CE ... EMS and firefighting professionals, has released four new continuing education courses as part ... taught live in an online classroom and meet the requirements of the National ...
(Date:1/17/2017)... ... January 17, 2017 , ... ... lecture to primary eye care practitioners on the latest breakthroughs in the prevention, ... Semi-Annual Continuing Education Symposium, according to eye surgeon, Jeffrey Martin, MD, FACS, Chief ...
Breaking Medicine News(10 mins):