- ALLERGY, RESPIRATORY
- New Spray Could Benefit Cystic Fibrosis Patients
- Molecule in Skin May Link Eczema and Asthma
- Folic Acid Might Offer Allergy Relief
- ALTERNATIVE MEDICINE
- Wristbands May Lessen Nausea After Radiation
- Bitter Melon Extract May Slow, Stop Breast Cancer
- Regular Yoga May Improve Eating Habits
- ANIMAL CARE
- 'Comfort Dogs' Come to Emotional Rescue
- Animals Respond to Acupuncture's Healing Touch
- Beware of Dog Bites
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- Varicose, Spider Veins May Be Inevitable for Some
- 'Snowbirds' Beware the Climate Changes
- Rheumatoid Arthritis May Harm Gums
- CANCER
- Smokeout '08: The Perfect Time to Quit
- Many Cancer Survivors Don't Adopt Healthy Lifestyle
- Massage Therapy Helps Those With Advanced Cancer
- CAREGIVING
- Moms Who Breast-Feed Less Likely to Neglect Child
- Study Links Pesticides to Birth Defects
- ER Less Likely to Diagnose Stroke in Younger Folks
- CIRCULATORY SYSTEM
- Bye, Bye Back Fat?
- Firefighters Have Narrower-Than-Normal Arteries, Study Finds
- Review Confirms Links Between Diet, Heart Health
- COSMETIC
- Gum Chewing May Cut Craving for Snacks
- New Genetic Links to Baldness Discovered
- Contact Lenses Boost Kids' Self-Image
- DENTAL, ORAL
- Acid Drinks Blamed for Increase in Tooth Erosion
- Mom's Vitamin D Levels Affect Baby's Dental Health
- Gum Disease May Reactivate AIDS Virus
- DIABETES
- Chamomile Tea May Ward Off Diabetes Damage
- Strict Blood Sugar Lowering Won't Ease Diabetes Heart Risk
- Findings Challenge Tight Glucose Control for Critically Ill Patients
- DIET, NUTRITION
- Blueberry Drink Protects Mice From Obesity, Diabetes
- More Educated Choose Healthier Foods, But Pay More
- Iced Teas Pose High Risk of Kidney Stones
- DISABILITIES
- Review Finds Marijuana May Help MS Patients
- Could Your Cell Phone Help Shield You From Alzheimer's?
- ENVIRONMENTAL HEALTH
- Where You Live May Affect Your Cancer Diagnosis
- Vest Monitors 'Individual' Air Pollution
- Gene Explains How High-Fructose Diets Lead to Insulin Resistance
- EYE CARE, VISION
- Brain Adapts to Age-Related Eye Disease
- Protein Might One Day Prevent Blindness
- High Temps Degrade Contact Lens Solution: Study
- FITNESS
- Go To Work But Skip The Car
- FDA Mandates New Warnings for Botox
- Exercise Extends Life of Kidney Patients
- GASTROINTESTINAL PROBLEMS
- Intestinal Bacteria Trigger Immune Response
- HRT Use Raises Risk of Stomach Trouble
- Peppermint Oil, Fiber Can Fight Irritable Bowel
- GENERAL HEALTH
- 6 to 8 Hours of Shut-Eye Is Optimal for Health
- Eat Light - Live Longer
- Lack of Vitamin D Linked to High Blood Pressure
- HEAD & NECK
- Ski Helmets Encouraged for All
- Zen May Thicken Brain, Thwart Pain
- Many Children Will Outgrow Headaches
- HEALTH & TECHNOLOGY
- Airport Full Body Scanners Pose No Health Threat: Experts
- Imaging Sheds Light on How Acupuncture Works
- 'Cell Phone Elbow' -- A New Ill for the Wired Age
- HEART & CARDIOVASCULAR
- Risk Factor for Stroke More Common Among Whites
- Small Cuts in Salt Intake Spur Big Drops in Heart Trouble
- Heart Disease May Be Prevented By Taking Fish Oils, Study Shows
- INFECTIOUS DISEASE
- Hand Washing 10 Times a Day May Help Keep Flu Away
- Swine Flu Loves a Crowd
- Viral Infection Might Trigger High Blood Pressure
- KID'S HEALTH
- Stomach Germ May Protect Against Asthma
- School Meals Need to Get Healthier
- More Calcium And Dairy Products in Childhood Could Mean Longer Life
- MEN'S HEALTH
- The Dark Side of Vegetarianism
- Drinking Green Tea May Slow Prostate Cancer
- Physical Activity May Prolong Survival After Colon Cancer
- MENTAL HEALTH
- Optimism May Boost Immune System
- The Unmedicated Mind
- Chocolate a Sweet Pick-Me-Up for the Depressed
- PREGNANCY
- Pre-Pregnancy Weight Linked to Babies' Heart Problems
- Sugary Colas Tied to Gestational Diabetes
- Breast-Feeding Benefits Moms and Babies
- SENIORS
- Older Adults May Have Some Immunity to Swine Flu
- For Older Walkers, Faster Is Better
- Memory Loss Help from Brain Supplement Prevagen
Heavy Traffic Can Be Heartbreaking
By eHolistic.com Published: 11/30/2008
By Karen Pallarito
HealthDay Reporter
SUNDAY, Nov. 30 (HealthDay News) -- The decline in highway traffic that was brought on by last summer's spike in gas prices may be a boon to heart health.
That's because automobile emissions are among a long list of risk factors for heart disease and stroke.
"There's a very coherent and consistent body of data that links particulate air pollution with cardiovascular disease and premature death," said Dr. Ted Schettler, science director of the Science and Environmental Health Network, an environmental and public health advocacy group.
Among the latest evidence: a German study published recently in Circulation: Journal of the American Heart Association, which found that people who live near heavy traffic are more likely to develop atherosclerosis, or hardening of the arteries, which can boost the risk of heart disease.
Atherosclerosis is a progressive disease that begins with damage to the lining of the arteries. Over time, the arteries accumulate plaque, a combination of fat, cholesterol, calcium and other substances. This causes the arteries to become rigid and narrow, impeding the flow of oxygen-rich blood to the heart and other parts of the body. This can lead to a heart attack, stroke or even death, according to the U.S. National Heart, Lung, and Blood Institute.
In 2004, the American Heart Association issued its first official statement on air pollution and cardiovascular disease. In reviewing the scientific evidence, an expert panel concluded that short-term exposure to elevated particulate matter, which includes motor vehicle emissions, "significantly contributes to increased acute cardiovascular mortality, particularly in certain at-risk subsets of the population."
The panel further noted that prolonged exposure to elevated levels of air pollution reduced overall life expectancy "on the order of a few years."
To assess the impact of long-term residential traffic exposure on the heart, Dr. Barbara Hoffmann, head of the unit of environmental epidemiology at the University of Duisburg-Essen, and colleagues used "electron-beam computed tomography" to measure calcium build-up in the arteries.
Compared with people who lived more than 200 meters, or 642 feet, from major traffic, the risk of coronary artery calcification was 63 percent higher for people living within 50 meters (160 feet) of heavy traffic, and 34 percent higher for those who were between 51 meters and 100 meters (164 to 328 feet) away. The risk was 8 percent higher for those living 100 meters to 200 meters (328 to 642 feet) away.
Hoffmann compares the damage wrought by traffic fumes to the effects of aging. "Living within 100 meters of a major road compared to people living further away amounts to a similar difference in coronary calcification as six months of aging," she said.
Her team is currently examining all study participants again to determine whether those living close to heavy traffic have suffered a greater increase in coronary calcification during the past five years.
So what can individuals do, short of moving away from heavily traveled roads, to stave off cardiovascular disease?
The best thing is focus on modifiable factors, such as keeping blood pressure and diabetes in check, lowering cholesterol, increasing physical activity and quitting smoking, Hoffmann said.
Reducing air pollution is a larger challenge.
In big U.S. cities, state and local agencies are required to report the Air Quality Index -- a measure of how pristine or polluted the air is -- each day, says AirNow, a federal government Web site on air quality. Depending on the level of concern, people with heart or lung disease, older adults and children may be advised to remain indoors
"That's just a Band-Aid on a public health problem," Schettler said. "Do we want people who have early cardiovascular disease to have to avoid breathing air outside, or do we want to clean up the air?"
More information
For more on the heart-health effects of air pollution, visit the American Heart Association.
SOURCES: Barbara Hoffmann, M.D., M.P.H., head, unit of environmental epidemiology, University of Duisburg-Essen, Germany; Ted Schettler, M.D., M.P.H., science director, Science and Environmental Health Network, Ann Arbor, Mich.; Aug. 13, 2008, news release, U.S. Department of Transportation, Washington, D.C.; July 17, 2007, Circulation; U.S. National Heart, Lung, and Blood Institute, Bethesda, Md.; American Heart Association, Dallas
Last Updated: Nov. 30, 2008
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