Journal article
Controlled exposure to combined particles and ozone decreases heart rate variability
Journal of Occupational and Environmental Medicine, Vol.50(11), pp.1253-1260
2008
Abstract
Objective: This experiment was designed to test if controlled exposure to particles and ozone would result in decreased heart rate variability (HRV). Methods: Five asthmatic adults were exposed for 4 hours to; filtered-air, carbon and ammonium nitrate particles, and particles and ozone. Twenty-minute electrocardiograms were obtained before and after each exposure. Results: Standard deviation of all normal-to-normal beat intervals (SDNN) decreased significantly across particles and ozone exposure compared with across filtered-air exposure (P = 0.01). Changes in SDNN-I (P = 0.04) and normalized low and high frequency (P = 0.02) were also seen across particles and ozone exposure; although these changes may best be characterized as trends given the small sample size. No significant changes in HRV were seen across the filtered-air or particles-only exposures. Conclusions: The results of this study suggest that combined particle and ozone exposure may decrease HRV in asthmatics. Further investigation is needed to confirm this finding.
Details
- Title
- Controlled exposure to combined particles and ozone decreases heart rate variability
- Authors
- K Power (Author) - University of California, United StatesJ Balmes (Author) - University of California, United StatesColin Solomon (Author) - Queensland University of Technology
- Publication details
- Journal of Occupational and Environmental Medicine, Vol.50(11), pp.1253-1260
- Publisher
- Lippincott Williams & Wilkins
- Date published
- 2008
- DOI
- 10.1097/JOM.0b013e3181814239
- ISSN
- 1076-2752
- Organisation Unit
- Centre for Human Factors and Systems Science; University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Health - Sports & Exercise Science; School of Health and Behavioural Sciences - Legacy
- Language
- English
- Record Identifier
- 99450268902621
- Output Type
- Journal article
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