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Objective: To analyze the effect of air pollution on heart rate variability in overweight individuals. Methods: A total of 46 adult individuals, both sexes, aged between 18 and 49 years and with body mass index >25kg/m 2 were analyzed. All volunteers were students from public schools of two cities in the state of São Paulo. The clinical, demographic and anthropometric data of each individual, as well as heart rate variability through time domain, geometric and frequency indices were collected. For the air quality analysis, the following variables were investigated: concentration of carbon dioxide, particulate matter, temperature and relative humidity. The analysis was carried out with descriptive and analytical statistics, adopting a level of significance of 5%. Results: There was a reduction in overall heart rate variability in overweight individuals by the following indices: mean standard deviation of all normal RR intervals, long-term standard deviation of continuous RR intervals, ratio of short-and long-term standard deviation of continuous RR intervals. In addition, the indices responsible for parasympathetic control showed a downward trend in their values, as well as the low frequency index, which represented sympathetic action, although not significant. Conclusion: Overweight individuals exposed to air pollution had lower heart rate variability than the Control Group.

Introduction:The main cause of death in the world is cardiovascular diseases and among the different risk factors, we can mention air pollution. Objectives: Describe the findings on the effects of air pollution on the autonomic cardiac modulation.Methods: The research was conducted using Scopus, PubMed, Web of Science and SciELO, over the term from 1996 to 2016. Manuscripts written in Portuguese or English, with keywords environmental pollution; air pollution; cardiovascular system; autonomic nervous system, texts dealing with environmental pollution and its relation to human exposition and original papers with the full text available on line were included. Results:The electronic search in databases resulted in 194 articles which were filtered according to gratuity full text delimited topic as well as the couple eliminated, resulting in 25 articles. Of these articles, 12 articles were included that specifically addressed the autonomic cardiac modulation. These remaining items were analyzed in Microsoft Office Excel 2010 program. Conclusion:The effects of air pollution on autonomic cardiac modulation are, in short, a reduction in autonomic cardiac modulation facing air pollution and its increases.

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