ALLERGY, RESPIRATORY
Herbal Remedy Could Halt Peanut Allergy
Combating Myths About Seasonal Allergies
Childhood Food Allergies on the Rise
ALTERNATIVE MEDICINE
Supplement Hampers Thyroid Cancer Treatment
Acupuncture Eases Breast Cancer Treatment Side Effects
Massage Therapy Helps Those With Advanced Cancer
ANIMAL CARE
Safe Toys for Dogs
Animals Respond to Acupuncture's Healing Touch
'Comfort Dogs' Come to Emotional Rescue
BONES & JOINTS
Bone Loss Stable on Restricted Calorie Diet
Human Ancestors Put Best Foot Forward 1.5M Years Ago
Tai Chi May Help Ward Off Knee Pain in Seniors
CANCER
Smoking Exposure Now Linked to Colon, Breast Cancers
Adding Garlic Might Cut Cancer Risk
Lifting Weights Can Ease Arm Swelling in Breast Cancer Survivors
CAREGIVING
Flu Strikes a Milder Blow This Season
UV Lights, Fans May Curb TB Spread in Hospitals
Preventing Shaken Baby Syndrome
CIRCULATORY SYSTEM
High Blood Fat Levels Common in Americans
Secondhand Smoke Quickly Affects Blood Vessels
Salt Boosts Blood Pressure in High-Risk Patients
COSMETIC
Science May Banish Bad Hair Days
Study Evaluates Laser Therapies for Hair Removal
With Psoriasis, the Internet May Offer Hope
DENTAL, ORAL
Obesity Boosts Gum Disease Risk
Study Links Osteoporosis Drugs to Jaw Trouble
Scientists Find Gene for Tooth Enamel
DIABETES
Fructose-Sweetened Drinks Up Metabolic Syndrome Risk
Whole Grains Take a Bite Out of Type 2 Diabetes Risk
Vitamin K Slows Insulin Resistance in Older Men
DIET, NUTRITION
Low Vitamin A, C Intake Tied to Asthma Risk
Successful Weight Loss Shows Unique Brain Patterns
Coffee Drinking Lowers Women's Stroke Risk
DISABILITIES
Could Your Cell Phone Help Shield You From Alzheimer's?
Review Finds Marijuana May Help MS Patients
ENVIRONMENTAL HEALTH
Think You Are Lead-Free? Check Your Soil
Old-Growth Forests Dying Off in U.S. West
Showerheads Harbor a Bounty of Germs
EYE CARE, VISION
Kids' Eye Injuries From Golf Clubs Rare But Severe
Eye Care Checkups Tied to Insurance Status
Certain Diabetes Drugs May Pose Eye Risk
FITNESS
Super Bowl Loss Can 'Kill' Some Fans
Exercise Extends Life of Kidney Patients
Want to Stop Cancer? You Can, Experts Say
GASTROINTESTINAL PROBLEMS
New Guidelines Issued for Management of IBS
Gum Chewing May Speed Colon Surgery Recovery
HRT Use Raises Risk of Stomach Trouble
GENERAL HEALTH
Any Old Cane Won't Do
Dry Weather Boosts Odds of Flu Outbreaks
More Whole Grains May Mean Less Fat
HEAD & NECK
Many Children Will Outgrow Headaches
Zen May Thicken Brain, Thwart Pain
Ski Helmets Encouraged for All
HEALTH & TECHNOLOGY
Combating Myths About Seasonal Allergies
Magnet Therapy May Ease Hard-to-Treat Depression
E-Mailing Your Way to Healthier Habits
HEARING
Summer Sounds Can Lead to Hearing Loss
Noise Hurts Men's Hearing More, Study Shows
HEART & CARDIOVASCULAR
Vitamin B3 May Help Repair Brain After a Stroke
Women Who Run May Benefit From Extra Folic Acid
After a Stroke, Light Exercise Gets Hands, Arms Working Again
INFECTIOUS DISEASE
Poor Restroom Cleaning Causes Cruise-Ship Sickness
The HPV Vaccine: Preventative Medicine or Human Sacrifice?
Viral Infection Might Trigger High Blood Pressure
INFERTILITY
Obesity May Affect Fertility in Young Womene
KID'S HEALTH
Folic Acid Reduces Infant Heart Defects
Standard IQ Test May Underestimate People With Autism
Health Tip: Back Pain in Children
MEN'S HEALTH
Drinking Green Tea May Slow Prostate Cancer
Eating Fast Until Full Triples Overweight Risk
Low Vitamin D Levels May Boost Men's Heart Attack Risk
MENTAL HEALTH
The Unmedicated Mind
Consciousness Helps the Mind and Body Work Together
Meaningful Conversations Boost Kids' Language Skills
PAIN
Tai Chi May Help Ease Fibromyalgia
Acupuncture, Real or Fake, Eases Back Pain
Alleviating Rheumatoid Arthritis
PHYSICAL THERAPY
PREGNANCY
Pre-Pregnancy Weight Linked to Babies' Heart Problems
Woman in America Are Delaying Motherhood, Study Says
For Baby and Mom Alike, Breast-Feeding May Be Best
SENIORS
The Healthy Habits of Centenarians
Memory Loss Help from Brain Supplement Prevagen
Boost In Elderly Population Will Be Felt Worldwide
SEXUAL HEALTH
SLEEP DISORDERS
6 to 8 Hours of Shut-Eye Is Optimal for Health
Better Sleep, Grades Seem to Go Up
Daylight Savings: Not a Bright Time for All
WOMEN'S HEALTH
Supplements Might Reduce Breast Cancer Risk
Iodine in Prenatal Vitamins Varies Widely
Natural Oils Help Lower Body Fat For Some
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Air Pollution May Raise Blood Pressure

(HealthDay News) -- Breathing polluted air for even two hours can boost blood pressure, potentially raising the risk of cardiovascular disease in those exposed to smog, a new study suggests.

Although the increase may not mean much for healthy people, "this small increase may actually be able to a trigger a heart attack or stroke," study author Dr. Robert D. Brook, an assistant professor of medicine at the University of Michigan, said in a university news release.

An estimated nearly one in three Americans suffer from high blood pressure, meaning the heart is straining to push blood through the circulatory system.

In the study, which appears in a recent issue of Hypertension, researchers tested 83 people as they breathed levels of air pollution similar to those in an urban city near a roadway.

"We looked at their blood vessels and then their responses before and after breathing high levels of air pollution," study co-author Robert Bard, a University of Michigan clinic research coordinator, said in a news release.

The air pollution caused diastolic pressure -- the lower number in a blood pressure reading -- to rise within two hours. Blood vessels were impaired for as long as 24 hours.

Tests showed that microscopic particles in the air, rather than ozone gases, caused the rise in blood pressure and impaired blood vessel function.

"If air pollution levels are forecasted to be high, those with heart disease, diabetes or lung disease should avoid unnecessary outdoor activity," Brook said.

SOURCES: University of Michigan, news release, September 2009 Published on: September 14, 2009