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:6/25/2016)... ... ... Austin residents seeking Mohs surgery services, can now turn to Dr. Jessica ... Peckham for medical and surgical dermatology. , Dr. Dorsey brings specialization to include Mohs ... Mohs Micrographic Surgery completed by Dr. Dorsey was under the direction of Glenn Goldstein, ...
(Date:6/25/2016)... ... , ... First Choice Emergency Room , the largest network of independent ... Director of its new Mesquite-Samuell Farm facility. , “We are pleased to announce ... Dr. James M. Muzzarelli, Executive Medical Director of First Choice Emergency Room. , ...
(Date:6/25/2016)... ... June 25, 2016 , ... On Friday, June 10, Van ... Wellness at Work award to iHire in recognition of their exemplary accomplishments in worksite ... 7th annual Maryland Workplace Health & Wellness Symposium at the BWI Marriott in Linthicum ...
(Date:6/24/2016)... ... June 24, 2016 , ... Those who have experienced ... feelings, many turn to unhealthy avenues, such as drug or alcohol abuse, as a ... has released tools for healthy coping following a traumatic event. , Trauma sufferers tend ...
(Date:6/24/2016)... ... June 24, 2016 , ... The ... in Dallas that it will receive two significant new grants to support its ... PHA marked its 25th anniversary by recognizing patients, medical professionals and scientists for ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... , June 23, 2016 Bracket , a ... its next generation clinical outcomes platform, Bracket eCOA (SM) ... on June 26 – 30, 2016 in Philadelphia ... electronic Clinical Outcome Assessment product of its kind to fully ... Bracket eCOA 6.0 is a flexible platform for ...
(Date:6/23/2016)... 23, 2016 Revolutionary technology includes ... Oticon , industry leaders in advanced audiology and hearing ... Oticon Opn ™, the world,s first internet connected hearing ... IoT devices.      (Photo: http://photos.prnewswire.com/prnh/20160622/382240 ... number of ,world firsts,: , TwinLink™ - ...
(Date:6/23/2016)... June 23, 2016  Experian Health, the ... transforming the patient payment and care experience, ... new products and services that will enhance ... cycle offerings. These award-winning solutions will enable ... remain compliant in an ever-changing environment and ...
Breaking Medicine Technology:
Cached News: