Association between PM and risk of hospitalization for myocardial infarction: a systematic review and a meta-analysis.

Background: It is generally assumed that there have been mixed results in the literature regarding the association between ambient particulate matter (PM) and myocardial infarction (MI). The aim of this meta-analysis was to explore the rate of short-term exposure PM with aerodynamic diameters ≤2.5 μm (PM) and examine its potential effect(s) on the risk of MI.