Indoor Air Purifiers May Help Heart Patients

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Indoor Air Purifiers May Help Heart Patients


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People with heart conditions may benefit from using indoor air purifiers, suggests a small study from China.


While the study can’t say air purifiers prevent heart attacks or other major medical problems, several risk factors for heart disease improved among young and healthy adults who were exposed to purified air.

The new findings suggest that using an air purifier may lead to a reduction in cardiovascular events, said Rajagopalan, who coauthored an editorial accompanying the new study in the Journal of the American College of Cardiology.


Previous studies found that fine particles in the air are tied to an increased risk of heart-related problems, including heart attack and stroke, the study authors say.


For the new study, Renjie Chen and Ang Zhao of Fudan University in Shanghai and colleagues had 35 healthy college students in Shanghai randomly use real or fake air purifiers in their dorm rooms for 48 hours. Two weeks later, the students spent another two days using whichever type they hadn’t used the first time.


China has one of the highest levels of air pollution in the world.


The target air pollution level set by the World Health Organization is 35 micrograms of tiny particles per cubic meter – but daily air pollution in major cities in Asia often exceed 100 to 500 micrograms per cubic meter, Rajagopalan writes in his editorial.


Air purification in the students’ rooms reduced air pollution by 57 percent, from about 96 micrograms per cubic meter to about 41 micrograms per cubic meter, the researchers say.


When the students had the real air purifiers in their rooms, they had significant improvements in several measures of inflammation and blood clotting.


They also had some significant decreases in blood pressure and a reduction in a measure of airway inflammation known as exhaled nitrous oxide.



Pollution levels in North America, for example, are much lower than in Asia, she said. “So, it’s hard to know if what you see in China is beneficial for North America.”


For people who live near high-pollution areas, such as major roadways and coal power plants, air purifiers may be something to look into, Taliercio said.

“From the standpoint of what you can do to protect yourself in these polluted environments, investing in home and car air filtration systems will lead to better air quality in the long term,” Rajagopalan said.

SOURCE: bit.ly/1GHoaG2 bit.ly/1GHorIZ Journal of the American College of Cardiology, online May 25, 2015.

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