How does air pollution trigger heart attacks? "When you
have exposure to that high a level of inhaled fine particulate matter, you’re
triggering your immune system," Meredith said. The immune response can
cause plaque built up in the arteries to become unstable and dislodge, clogging
arteries and blocking blood flow to the heart.
In the Salt Lake City area, where Intermountain is based,
cold air masses tend to settle in the valley in January and February, Meredith
said, bringing smog with them. "It’ll look pretty gray, the air is thick
and brown," he said. "In mountains a thousand feet above that, you can
actually see that layer."
For people with heart disease, the study suggests limiting
time outdoors and exercise at relatively modest levels of pollution. The risk
to people with heart disease increases with more particulates above that
threshold. "The data suggests that you can recommend that patients with
heart disease are more vulnerable for those types of events when they’re
exposed to higher levels of pollution," Meredith said. #CBHealthNY
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