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:


(Date:1/21/2019)... ... ... Dallas and Plano pet sitting company , Park Cities Pet Sitter, ... 9th from 2:30pm-3:30pm. The classes will run for 5 consecutive weeks, and will ... , The series of classes will be taught by Park Cities Pet Sitter ...
(Date:1/20/2019)... ... January 19, 2019 , ... With more than 20 years ... quality and delivery of health care services to SCFHP members via medical oversight ... Services and Supports and Behavioral Health. In addition, she oversees the development and ...
(Date:1/14/2019)... ... 14, 2019 , ... After many months of preparation, the providers and staff ... Allergy & Asthma. This new allergy and asthma clinic is conveniently located in the ... destination for any immunological and respiratory medical care needs. , In the new allergy ...
(Date:1/14/2019)... ... January 15, 2019 , ... Jeffery Nelson, ... Colorectal Diseases, Institute for Digestive Health & Liver Disease at Mercy Medical ... A specially designed instrument known as a suction hemorrhoid ligator is used with ...
(Date:1/14/2019)... ... January 14, 2019 , ... ... the newly updated International Audit Protocol Consortium (IAPC) EHS audit protocol for ... to understand the scope of their EHS regulatory obligations and rapidly collect, share, ...
Breaking Medicine News(10 mins):
(Date:1/21/2019)... ... January 21, 2019 , ... ... other films and television series, Laurence Fishburne, also lends his talents as host ... a light on some of the most important issues facing modern society today. ...
(Date:1/20/2019)... ... 19, 2019 , ... California firefighter Trent Knuckles is the latest recipient of ... one of three prize packages that included a check for $2,250 to purchase the ... that included a carry bag, backpack, RAID Glasses, flashlight, hats and more. The value ...
(Date:1/15/2019)... ... January 15, 2019 , ... RMA of Connecticut, a leading fertility practice whose ... free informational event that will demystify fertility age-related issues and will include complimentary ... Your Real Fertility Age ,” will take place on Thursday, January 24th at 6 ...
Breaking Medicine Technology:
Cached News: