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Air Pollution Linked to Stroke and Heart Disease

Air Pollution Linked to Stroke and Heart Disease

Two recent research studies found air pollution can raise the risk of stroke and contribute to heart disease. The first study examined medical records of 1,705 Boston area patients who had been hospitalized with ischemic stroke. Researchers then studied environmental data on vehicle emissions such as particulate matter, black carbon, and nitrogen dioxide. Their study revealed strokes are more likely to happen right after a 24-hour period when air pollution worsens. The chance of having a stroke was 34% higher on a day with a moderate level of air pollution compared to a day with a good level. Strangely, even though the increase in air pollution was found to have a connection with ischemic stroke, the EPA apparently considers that level to be safe.

The researchers estimated a 20% reduction in fine particulate matter could have prevented 6,100 strokes that occurred in the northeast in 2007.

The second study was a meta-analysis (review) of 34 studies of air pollution and heart disease. Particulate matter, carbon monoxide, nitrogen dioxide, and sulfur dioxide  which are all emitted by vehicles as air pollution and were found to be linked with a slight increase in the risk of heart attack in the short-term.

Fine particulate matter is emitted in vehicle exhaust, and when inhaled can cause inflammation in the body’s tissues. Researchers from both studies agreed reducing exposure to air pollution for people who are at risk of stroke or heart attack would be beneficial, but said the main causes of these diseases are related to lifestyle choices such as diet, exercise and not smoking.

Another study of vehicle emissions, specifically from diesel trucks and buses, found their ultrafine particulate matter can increase the risk of heart attack and stroke. One of the researchers said people with heart disease should try to limit their exposure to diesel exhaust by not remaining near busy roads for long periods.

For people living in highly polluted cities, could there be a greater effect due to the fact their heart disease was caused in part by having lived in a city for many years, and such spikes in air pollution can increase the chance of a heart attack or stroke event?

Long-time city dwellers might have a very difficult time moving out of an urban culture they presumably enjoy, and leaving behind their established social life, even if it is better for their health. Clean, renewable energy is one possible solution, because as we become less dependent fossil fuels, air pollution levels should decline.

Image Credit: Public Domain


Related Links

Diesel Exhaust Linked to Heart Attack Risk
Pollution Hurts Animals Too

Read more: Conscious Consumer, Health

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9:09AM PST on Feb 18, 2014

Thanks for sharing.

7:09AM PDT on May 13, 2013

Pollution is a Global Killer

Could Just One Degree Change the World

9:46AM PST on Dec 5, 2012

No surprises here, thanks for posting, re-shared!

11:54PM PST on Feb 20, 2012

I'm definitely detrimentally affected by this - even in a smaller town, when you live close to a busy road - you can't escape it!

8:27AM PST on Feb 19, 2012


6:55AM PST on Feb 19, 2012

no surprised here and in china the rate is much worse and so handicap caused by and water!

Governments all over the world do not take this seriously...if they did they would in force laws for cars,trucks,planes etc....

would encourage green fuel and green living starting with few people break for people with few or no they polLute less...


1:45AM PST on Feb 19, 2012

Obvious and frequently reported, as stated by Doug & Dylan.

11:37PM PST on Feb 18, 2012


9:01PM PST on Feb 18, 2012

Included some more facts that I didn't know. I hate the bad air days because I can't breathe with chronic asthma!!!

8:01PM PST on Feb 18, 2012

Seems to me we've been hearing this for decades! Still getting worse. Still no action.

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Disclaimer: The views expressed above are solely those of the author and may not reflect those of
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