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Using HEPA filters may improve cardiovascular health
Date:2/15/2008

One day doctors may recommend using high efficiency particle air (HEPA) filters along with weight loss, smoking cessation, and exercise to improve cardiovascular health, according to researchers in Denmark. In a recent study, they found that using HEPA filters for just two days significantly improved a key measure of cardiovascular health in healthy, non-smoking elderly individuals.

Reduction of particle exposure by filtration of recirculated air for only 48 hours improved the microvascular function (MVF) in healthy elderly citizens, said Professor Steffen Loft, M.D., D.M.Sc., of the Institute of Public Health in Copenhagen. This suggests that indoor air filtration represents a feasible means of reducing cardiovascular risk. Abnormal function of the inner lining of small vessels is known to be a predictor of dangerous or possibly fatal cardiovascular events.

The study was published in the second issue for February of the American Journal of Respiratory and Critical Care Medicine, published by the American Thoracic Society.

The researchers measured MVF and ambient airborne particles in the homes of 21 non-smoking couples aged 60-75 who lived close to heavily trafficked roads. Each couple used air purifiers for two 48-hour periods. During one period, the purifier was equipped with a HEPA filter, and during the other, it ran without it, so that each individual served as his or her own control. The size distribution and number concentration of indoor air particles in each home were continuously monitored.

The researchers then assessed each individuals MVF using a noninvasive finger sensor. Several secondary endpoints were studied in blood and urine samples to assess possible mechanisms of action: markers of inflammation, hemostasis, and oxidative stress.

Our main finding was a significant improvement in the function of small finger blood vessels after reduction of indoor air particles. This effect most likely indicates a
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Contact: Keely Savoie
ksavoie@thoracic.org
212-315-8620
American Thoracic Society
Source:Eurekalert

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