Exposure to high levels of particulate air pollution, or PM10, was linked to a greater risk of serious heart conditions including heart attack, according to a study presented at a meeting of the European Society of Cardiology. Researchers analyzed PM10 concentrations and hospitalization rates for heart events in Brescia, Italy, from 2004 to 2007, and found a 3% increase in hospital admissions for serious cardiac problems for every 10-microgram increase in PM10 levels. The link was particularly strong in men and people older than 65, as well as those previously admitted for treatment of heart problems.

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