Navigation Links
Diesel exhaust may increase risk in patients with heart disease

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
University of Edinburgh

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:
(Date:11/27/2015)... ... November 27, 2015 , ... ... software Q-Suite, announces the incorporation of Asterisk 11 LTS (Long Term Support) into ... Asterisk 11 LTS brings Q-Suite 5.10 up-to-date with a version of Asterisk that ...
(Date:11/26/2015)... NV (PRWEB) , ... November 26, 2015 , ... Inevitably ... strategy. Many customers choose to buy during the Black Friday and Cyber Monday ... Shoppers don’t need to search the Internet high and low to find the best ...
(Date:11/26/2015)... ... November 26, 2015 , ... Somu Sivaramakrishnan announced ... franchise owner, Somu now offers travelers, value and care based Travel Services, including ... sales, as well as, cabin upgrades and special amenities such as, shore excursions, ...
(Date:11/26/2015)... ... ... Jobs in hospital medical laboratories and in the imaging field lead the ... Aureus Medical Group . These fields, as well as travel nursing, ranked ... jobs through the company’s website, , The leading healthcare staffing agency ...
(Date:11/26/2015)... , ... November 26, 2015 , ... ... medical opinion process, participated in the 61st annual Employee Benefits Conference. The Employee ... took place Sunday, November 8th through Wednesday, November 11th, 2015. The conference was ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... , November 26, 2015 ... addition of the "Radioimmunoassay Market by ... (Hospital, Pharmaceutical Industry, Academics, Clinical Diagnostic Labs), ... Global Forecast to 2020" report to ... has announced the addition of the ...
(Date:11/25/2015)... , Nov. 25, 2015  The American ... and Gynecologists (ACOG), and the March of Dimes ... Protecting Our Infants Act of 2015 ... number of newborns born exposed to drugs, such ... the bill,s introduction, all three organizations have worked ...
(Date:11/25/2015)... Nov. 25, 2015  Henry Schein, Inc., the world,s ... office-based dental, medical and animal health practitioners, will unveil ... Henry Schein ConnectDental® Pavilion , which brings together ... open solutions designed to help any practice or laboratory ... for a schedule of experts appearing at the ...
Breaking Medicine Technology: