Navigation Links
Even low levels of air pollution may pose stroke risk
Date:5/30/2008

ANN ARBOR, Mich.---Short-term exposure to low levels of particulate air pollution may increase the risk of stroke or mini-stroke, according to findings that suggest current exposure standards could be insufficient to protect the public.

"The vast majority of the public is exposed to ambient air pollution at the levels observed in this community or greater every day, suggesting a potentially large public health impact," said Lynda Lisabeth, lead author and assistant professor in the University of Michigan School of Public Health.

However, Lisabeth stressed that the association requires further study in other areas with varying climates and alternative study designs. Stroke is the third leading cause of death in the United States.

The study examined particulate air pollution in a southeast Texas community where there is a large petroleum and petrochemical industry presence. Particulate matter is one type of air pollution, defined as tiny particles of solid or liquid that can cause numerous health problems when inhaled. These particles can be man-made or from natural sources.

In the study, researchers identified ischemic strokes and transient ischemic attacks (TIA), sometimes called mini strokes but that often lead to a stroke later. Ischemic attacks are caused by a blockage of blood flow to the brain by a blood clot.

The results showed borderline significant associations between same day and previous day fine particulate matter exposures and ischemic stroke/TIA risk. Similar associations were also seen with ozone, another type of pollution. Despite the fossil fuel industry in the area, fine particulate matter exposures were low relative to other regions of the country, probably because of the proximity to the coast and prevailing wind patterns.

Findings suggest that recent exposure to fine particulate matter may increase the risk of ischemic cerebrovascular events specifically. Some research has shown that particulate air pollution is associated with acute artery vasoconstriction and with increased thickening of the blood, which may enhance the potential for blood clots. However, this requires further study.

Researchers looked at data from the Brain Attack Surveillance in Corpus Christi Project, a population-based stroke surveillance project designed to capture all strokes in Nueces County, Texas. Ischemic stroke and TIA cases between 2001 and 2005 were identified using trained staff and later verified by neurologists. Daily historical air pollutant and meteorological data were obtained for the same time period from the Texas Commission on Environmental Quality's Monitoring Operations database. Data on fine particulate matter and ozone were available from a centrally located monitor in Corpus Christi, Tex., located upwind of the local industrial facilities. The majority of stroke/TIA cases were also located upwind of local chemical plants and refineries.


'/>"/>

Contact: Laura Bailey
baileylm@umich.edu
734-647-1848
University of Michigan
Source:Eurekalert

Related biology news :

1. Study shows mercury levels from products decreasing, though still at dangerous levels
2. Genetic breakthrough explains dangerously high blood glucose levels
3. Exposure to low levels of radon appears to reduce the risk of lung cancer, new study finds
4. High levels of estrogen associated with breast cancer recurrence
5. Increased allergen levels in homes linked to asthma
6. New genetic variants associated with lipid levels, risk for coronary artery disease
7. University of Alberta researchers report breakthrough in lowering bad cholesterol, fatty acid levels
8. Methadone even at therapeutic levels can kill
9. Dartmouth researchers alarmed by levels of mercury and arsenic in Chinese freshwater ecosystem
10. Manure management reduces levels of antibiotics and antibiotic resistance genes
11. Even minute levels of lead cause brain damage in children
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/1/2016)... , February 1, 2016 ... advancements to drive global touchfree intuitive gesture control market ... --> Rising sales of consumer electronics coupled with ... control market size through 2020 ... electronics coupled with new technological advancements to drive global ...
(Date:1/27/2016)... Ohio , Jan. 27, 2016  Rite Track, ... based in West Chester, Ohio ... award winning service staff, based in Austin, ... capacity and ability to provide modifications, installations and technical ... Dovalina , CEO of PLUS, commented, "PLUS has provided ...
(Date:1/22/2016)... http://www.researchandmarkets.com/research/p74whf/global_biometrics ) ... "Global Biometrics Market in Retail Sector 2016-2020" ... --> http://www.researchandmarkets.com/research/p74whf/global_biometrics ) has announced the ... in Retail Sector 2016-2020" report to ... and Markets ( http://www.researchandmarkets.com/research/p74whf/global_biometrics ) has announced ...
Breaking Biology News(10 mins):
(Date:2/6/2016)... ... February 06, 2016 , ... Contact:, Abby Mitchell, ... Excellence in Education Sponsors Teacher Training Program , Bite of Science Dinner Event ... Center for Excellence in Education (CEE) will sponsor a Bite of Science professional ...
(Date:2/5/2016)... DIEGO , Feb. 5, 2016 On ... region,s trusted information source for community, health and disaster ... Diego) will integrate to enhance care coordination and ... to the services they need and to better connect ... improve care.   San Diego ...
(Date:2/4/2016)... ... February 04, 2016 , ... ... and compliance training, today announced an interactive FDA compliance training course, ... RAPS (Regulatory Affairs Professional Society) accredited interactive course on Morf Playbook—now conveniently available ...
(Date:2/4/2016)... ... February 04, 2016 , ... ... and triple quad LC-MS, host live demos and poster sessions, and present on ... exhibition. The conference takes place March 6 to 10 at the Georgia World ...
Breaking Biology Technology: