Navigation Links
Diesel exhaust may increase risk in patients with heart disease
Date:9/12/2007

Air pollution could be putting patients with heart disease at risk by affecting blood vessels and clotting, researchers warn.

A study by the University of Edinburgh and Ume University measured the effects of diesel exhaust on heart and blood vessel function in men who have previously experienced a heart attack.

The research, funded by the British Heart Foundation and published in the New England Journal of Medicine, found that inhalation of diesel exhaust caused changes in the hearts electrical activity, suggesting that air pollution reduces the amount of oxygen available to the heart during exercise.

Dr Nicholas Mills, of the University?s Centre for Cardiovascular Sciences, said: This study provides an explanation for why patients with heart disease are more likely to be admitted to hospital on days in which air pollution levels are increased. Most people tend to think of air pollution as having effects on the lungs but, as this study shows, it can also have a major impact on how our heart functions.

Twenty men who had suffered a previous heart attack were carefully screened to ensure they did not suffer from angina or heart rhythm problems and that their heart condition was stable and appropriately treated. The men were exposed for one hour to either filtered air or dilute diesel exhaust while intermittently riding a stationary bicycle in a carefully monitored exposure chamber in Ume University. Heart function was monitored continuously and blood tests taken six hours after leaving the chamber.

Electrical monitoring of the heart showed that inhalation of diesel exhaust caused a three-fold increase in the stress of the heart during exercise. In addition, the bodys ability to release a ?guardian protein known as t-PA (tissue plasminogen activator), which can prevent blood clots from forming, was also reduced by more than one third following exposure.

The link between air pollution and heart disease is strongest for the fine exhaust particles produced by road traffic. Researchers are particularly interested in diesel engines because they generate 10-100 times more pollutant particles than petrol engines. The number of diesel-powered automobiles is increasing in Europe and other parts of the world.

Diesel exhaust consists of a complex mixture of particles and gases. Before we can recommend the widespread use of particle traps in diesel engines, we need to show that particles are the responsible component, Dr Mills said.

If we do that, then it is likely that devices to filter particles from exhaust, will reduce exposure and benefit public health.

Professor Peter Weissberg, Medical Director of the British Heart Foundation (BHF), said: There is already evidence that air pollution can make existing heart conditions worse. This research is helping us work out why. It shows that in patients with coronary heart disease, diesel exhaust can reduce the amount of oxygen available to the heart during exercise, which may increase the risk of a heart attack.

Because of the overwhelming benefits of exercise on heart health, we would still encourage heart patients to exercise regularly, but preferably not when there is a lot of local traffic around. Heart patients can look out for pollution levels on their local weather forecasts.


'/>"/>
Contact: Tara Womersley
tara.womersley@ed.ac.uk
01-316-509-836
University of Edinburgh
Source:Eurekalert

Related medicine news :

1. Antioxidants in the body protects the airways from diesel exhaust effect
2. Fuel demand to be met by Bio-diesel
3. Asthma Symptoms Linked to Soot from Diesel Trucks in So. Bronx
4. Diesel Exposure Model Reduces Allergy Risk Assessment Errors
5. Giant Microwave That Recycles Plastic Back into Diesel, Gas
6. Dolly Paves the Way for Exhaustive Stem Cell Research
7. How HIV "Exhausts" Killer T Cells
8. Sheer exhaustion makes a junior doc’ kill a patient!
9. Cancer Drug Helps An Anti-Cancer Virus To Act More Exhaustively
10. Exhaustive Study to Expand the Efficacy of Drug L-dopa for Parkinsons
11. Paris Exhausted After Excessive Partying
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... , ... Pixel Film Studios Released ProSlice Levels, a Media Slicing Effect ... a whole new perspective by using the title layers in ProSlice Levels to ... ProSlice Levels contains over 30 Different presets to choose from. FCPX users ...
(Date:6/25/2016)... ... June 25, 2016 , ... Experts from the American Institutes ... Research Meeting June 26-28, 2016, at the Hynes Convention Center in Boston. , ... advance care planning, healthcare costs and patient and family engagement. , AIR researchers ...
(Date:6/25/2016)... ... June 25, 2016 , ... First Choice Emergency Room , ... Sesan Ogunleye, as the Medical Director of its new Mesquite-Samuell Farm facility. , ... our new Mesquite location,” said Dr. James M. Muzzarelli, Executive Medical Director of First ...
(Date:6/25/2016)... ... June 25, 2016 , ... Conventional wisdom preaches the benefits of ... of the latter, setting the bar too high can result in disappointment, perhaps even ... progress toward their goal. , Research from PsychTests.com reveals that behind ...
(Date:6/24/2016)... ... June 24, 2016 , ... Marcy was in a crisis. Her son James, eight, was ... his family verbally and physically. , “When something upset him, he couldn’t control his emotions,” ... He would throw rocks at my other children and say he was going to kill ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... -- Research and Markets has announced the addition ... - Forecast to 2022" report to their offering. ... to date financial data derived from varied research sources to ... potential impact on the market during the next five years, ... of sub markets, regional and country level analysis. The report ...
(Date:6/23/2016)... 2016 Research and Markets has announced ... report to their offering. ... a favourable commercial environment for MedImmune to enter. The US ... will serve to drive considerable growth for effective anti-influenza medications. ... cap sales considerably, but development is still in its infancy. ...
(Date:6/23/2016)... 2016 , , , WHEN: ... 2016 , , , , LOCATION: , , , Online, ... , , EXPERT PANELISTS:  , , , Frost & Sullivan,s Global ... Bird; Senior Industry Analyst, Divyaa Ravishankar and Unmesh Lal, Program Manager ... pharmaceutical industry is witnessing an exceptional era. Several new demand spaces, ...
Breaking Medicine Technology: