HOME >> MEDICINE >> NEWS
Air pollution causes healthy blood vessels to constrict

DALLAS, March 12 For the first time researchers have shown that air pollution negatively affects the blood vessels of healthy humans, according to a study in todays rapid access issue of Circulation: Journal of the American Heart Association.

In the study, 25 healthy people inhaled elevated concentrations of fine particles plus ozone for two hours. After exposure, volunteers blood vessels constricted between 2 percent and 4 percent on average. Their vessels did not constrict when they were exposed to ozone-free and particle-free air.

We have a wealth of epidemiological data saying that air pollution is associated with adverse respiratory and cardiovascular outcomes, but there is still a lack of understanding as to how the association occurs physiologically. These findings suggest a possible reason why the rate of heart attacks and other cardiovascular events increases with exposure to air pollution for people with known heart and blood vessel disease, says Robert D. Brook, M.D., study co-author and assistant professor of internal medicine in the division of hypertension and vascular medicine program at the University of Michigan, Ann Arbor.

There have been some suggestions in previous studies that people with atherosclerosis tend to respond with greater-than-normal constriction, or narrowing of blood vessels, in response to certain hormones in the body. Could it be that their blood vessels also have enhanced constriction in response to air pollution? Future studies will be needed to answer that question, Brook says.

The researchers focused on ozone and fine particulate matter. Fine particles are those with a diameter of less than 2.5 micrometers. Fine particles are emitted from burning fossil fuels, mostly from car engine exhaust, power generation and many industrial processes. Ozone and additional particulate materials are created when the sun shines on these emissions.

In other research, exposure to fine particles has been
'"/>

Contact: Carole Bullock
carole.bullock@heart.org
214-706-1279
American Heart Association
11-Mar-2002


Page: 1 2 3

Related medicine news :

1. Air pollution thickens the blood
2. Satellite data reveal immense pollution pool over Bihar, India
3. Day-long drivers at risk of cardiovascular problems as a result of traffic pollution
4. Hong Kong think tank calls for pollution standards
5. Respiratory infections, not air pollution, pose winter health threat for children with asthma
6. Air pollution may cause and speed up artery disease
7. Global air pollution map produced by Envisats SCIAMACHY
8. UW to lead most comprehensive study of air pollution and cardiovascular disease
9. Air pollution especially harmful to lungs of obese children
10. PNNL develops mercury-absorbing pollution solution
11. Air pollution may significantly worsen respiratory allergies in individuals with genetic risk

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Air pollution causes healthy blood vessels constrict

(Date:10/31/2014)... 31, 2014 (HealthDay News) -- Sleep apnea may make it ... you parked your car or left your house keys, a ... sleep apnea showed that this ability -- called spatial memory ... (REM) sleep, even when other stages of sleep weren,t affected. ... dreams typically occur. "We,ve shown for the first time ...
(Date:10/31/2014)... Americans say that either they or a family member ... the latest issue of The Gerontological Society of America,s ... ), which goes on to show that Americans strongly ... patients, end-of-life health care wishes. , This PP&AR ... ," features 12 articles that present new ways of ...
(Date:10/31/2014)... 2014 North Shore Eye Care today ... Long Island and the addition of leading ophthalmologist, William ... to North Shore Eye Care Medical Director, Jeffrey Martin, ... of the Department of Ophthalmology of Winthrop-University Hospital and ... City for more than 30 years. He has been ...
(Date:10/31/2014)... York, NY (PRWEB) October 31, 2014 ... of the most remarkable gifts of life — building ... for matching extraordinary surrogate mothers and donors with hopeful ... individuals in unforeseen circumstances. , It’s a collective aptitude ... surrogacy agencies, surrogacy lawyers, and fertility clinics that help ...
(Date:10/31/2014)... BCC Research ( http://www.bccresearch.com ) reveals in its new ... U.S. indoor air quality (IAQ) market is expected to grow ... rate (CAGR) of 7% over the next five years. The ... of 7.4%. , Since 2012, continuing media attention focused ... infectious diseases such as bird flu and the increase in ...
Breaking Medicine News(10 mins):Health News:Sleep Apnea May Steal Some of Your Memory: Study 2Health News:Advance directives can benefit patients, families, and health care system 2Health News:William Kasper, MD Garden City Ophthalmologist, Joins Medical Staff at North Shore Eye Care 2Health News:William Kasper, MD Garden City Ophthalmologist, Joins Medical Staff at North Shore Eye Care 3Health News:Over 800 New Surrogate Mother Members at FindSurrogateMother.com Helping Create Pathways to Parenthood 2Health News:Over 800 New Surrogate Mother Members at FindSurrogateMother.com Helping Create Pathways to Parenthood 3Health News:Global Market for U.S. Indoor Air Quality (IAQ) to Reach $11.4 Billion by 2019; Equipment Market Segment Surging at 7.4% CAGR 2Health News:Global Market for U.S. Indoor Air Quality (IAQ) to Reach $11.4 Billion by 2019; Equipment Market Segment Surging at 7.4% CAGR 3
(Date:10/31/2014)... YORK , Oct. 31, 2014 Though ... cell technologies are expected to show an annual increase ... market value of nearly $1 billion, according to Kalorama ... revenues from proprietary stem cell therapeutics that have gained ... authorities. "As drug developers tackle ever more ...
(Date:10/30/2014)... Oct. 30, 2014   NxStage® Kidney Care, Inc ., ... ), is proud to host the grand opening ceremony of ... 1600 W. 16 th Street on November 20, 2014 ... highly trained medical staff who are committed to providing patients ... life benefits made possible through more flexible dialysis treatment options.   ...
(Date:10/30/2014)... Oct. 30, 2014   ViaDerma, Inc. ... bringing new products to market, has recently released ... TetraStem is a topical liquid tetracycline-based antibiotic that ... can convert oral medication active ingredients into topical ... first aid antibiotic to help prevent skin infection ...
Breaking Medicine Technology:Report: Stem Cell Technologies Market Growing 2Grand Opening of NxStage Kidney Care Oak Brook IL Center 2Grand Opening of NxStage Kidney Care Oak Brook IL Center 3ViaDerma, Inc. Lead Product TetraStem Shown Effective in Fighting Staph Infections including MRSA 2ViaDerma, Inc. Lead Product TetraStem Shown Effective in Fighting Staph Infections including MRSA 3
Cached News: