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:4/29/2016)... ... , ... Our bodies are bombarded daily by environmental and lifestyle factors that ... is to adopt a more healthful diet, but too many people think that food ... Nutritionist and the creator of the Newport Beach Cleanse and 14-Day Eating Plan, disagrees ...
(Date:4/29/2016)... , ... April 29, 2016 , ... On Tuesday, April ... across the Southeast, celebrated the signature of Gov. Nathan Deal on SB 258, the ... Duncan (R - Cumming), offers a 70% tax credit to individuals and corporations which ...
(Date:4/29/2016)... ... April 29, 2016 , ... The American workforce ... stability, even security. Most importantly, employees are the single most important asset in ... workers so unhappy? , Just under half of American workers are emotionally checked ...
(Date:4/29/2016)... ... April 29, 2016 , ... Dr. Bernie Siegel, ... "LOVE, MEDICINE and MIRACLES") addresses touchy topics related to Death live on ... Dr. Bernie Siegel, author of a plethora of essential books-to-read for physicians ...
(Date:4/29/2016)... ... April 29, 2016 , ... The White House ... their loans, more information about their loan terms and accounts, and more protections ... debt, including federal and private loans, has reached $1.3 trillion, with 43 million ...
Breaking Medicine News(10 mins):
(Date:4/29/2016)... BERLIN , April 29, 2016 ... world-leading glyco-biology expertise, today announces the appointment of Dr. ... Dr. Zurlo is an oncologist with many years ... pharmaceutical and biotechnology industries. His last role was at ... Member of the Executive Board. Previously Dr. Zurlo held ...
(Date:4/28/2016)... 2016  Marking its one year anniversary since ... cancer risk test, Color Genomics announced ... highly impact the most common hereditary cancers affecting ... Test analyzes hereditary cancer risks for breast, colorectal, ... The Color Test is physician ordered and includes ...
(Date:4/28/2016)... , April 28, 2016 Dr. ... and Ste phen ... ArisGlobal®, a leading provider of cloud-based software solutions for life ... Pharmacovigilance team to bring a wealth of insight to a growing ... pharmacovigilance knowledge. George Phillips joined ArisGlobal in ...
Breaking Medicine Technology: