Fine and coarse particulate matter exposures and associations with acute cardiac events among participants in a telemedicine service: A case-crossover study

Subclinical cardiovascular changes have been associated with ambient particulate matter (PM) exposures within hours. Although the U.S. Environmental Protection Agency continues to look for additional evidence of effects associated with sub-daily PM exposure, this information is still limited because most studies of clinical events have lacked data on the onset time of symptoms to assess rapid increased risk. The objective of the study was to investigate associations between sub-daily exposures to PM and acute cardiac events using telemedicine data.

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