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Air pollution has been associated with increased risk for myocardial infarction (JAMA 2012; 307:713). To assess its potential association with risk for acute heart failure (HF), researchers systematically reviewed the literature and ultimately identified 35 relevant studies in 12 countries, published from 1995 to 2010. All 35 studies tracked levels of specific air pollutants (both gases and particulate matter) and rates of HF-related hospitalization and mortality. A random-effects model was used to estimate the overall risk from each pollutant.
The risk for HF-related hospitalization or death was temporally and significantly associated with exposure to carbon monoxide (3.5% greater risk per 1 part per million), sulphur dioxide (2.4% greater …