Key result
Exposure to sidestream cigarette smoke impairs cardiac autonomic regulation by affecting sympathetic and parasympathetic responses and increasing heart rate reactivity.
Why the study?
Does sidestream cigarette smoke exposure affect cardiac autonomic regulation?
Does sidestream cigarette smoke exposure affect cardiac autonomic regulation?
Sidestream cigarette smoke exposure impairs cardiac autonomic regulation, potentially through increased oxidative stress in brainstem areas, highlighting the cardiovascular risks of passive smoking.
Answers are grounded in this paper and cite their sources.
Clinicians should advise avoiding sidestream smoke exposure; reinforces autonomic dysregulation as a pathway in passive smoking-related cardiovascular risk.
BACKGROUND: The literature has already demonstrated that cigarette influences the cardiovascular system. In this study, we performed a literature review in order to investigate the relationship between sidestream cigarette smoke (SSCS) and cardiac autonomic regulation. METHODS: Searches were performed on Medline, SciELO, Lilacs and Cochrane databases using the crossing between the key-words: "cigarette smoking", "autonomic nervous system", "air pollution" and "heart rate variability". RESULTS: The selected studies indicated that SSCS exposure affects the sympathetic and parasympathetic responses to changes in arterial blood pressure. Moreover, heart rate responses to environmental tobacco smoke are increased in smokers compared to non-smokers. The mechanism involved on this process suggest increased oxidative stress in brainstem areas that regulate the cardiovascular system. CONCLUSION: Further studies are necessary to add new elements in the literature to improve new therapies to treat cardiovascular disorders in subjects exposed to sidestream cigarette smoke.
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Valenti et al. (2013) conducted a review in Cardiac autonomic regulation. Sidestream cigarette smoke (SSCS) vs. Fresh air or non-exposed controls was evaluated on Cardiac autonomic regulation (sympathetic and parasympathetic responses). Exposure to sidestream cigarette smoke impairs cardiac autonomic regulation by affecting sympathetic and parasympathetic responses and increasing heart rate reactivity.
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