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Published in: Environmental Health and Preventive Medicine 1/2020

Open Access 01-12-2020 | Review article

Acute effect of ambient fine particulate matter on heart rate variability: an updated systematic review and meta-analysis of panel studies

Authors: Zhiping Niu, Feifei Liu, Baojing Li, Na Li, Hongmei Yu, Yongbo Wang, Hong Tang, Xiaolu Chen, Yuanan Lu, Zilu Cheng, Suyang Liu, Gongbo Chen, Yuxiao Zhang, Hao Xiang

Published in: Environmental Health and Preventive Medicine | Issue 1/2020

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Abstract

Background

Decreased heart rate variability (HRV) is a predictor of autonomic system dysfunction, and is considered as a potential mechanism of increased risk of cardiovascular disease (CVD) induced by exposure to particulate matter less than 2.5 μm in diameter (PM2.5). Previous studies have suggested that exposure to PM2.5 may lead to decreased HRV levels, but the results remain inconsistent.

Methods

An updated systematic review and meta-analysis of panel studies till November 1, 2019 was conducted to evaluate the acute effect of exposure to ambient PM2.5 on HRV. We searched electronic databases (PubMed, Web of Science, and Embase) to identify panel studies reporting the associations between exposure to PM2.5 and the four indicators of HRV (standard deviation of all normal-to-normal intervals (SDNN), root mean square of successive differences in adjacent normal-to-normal intervals (rMSSD), high frequency power (HF), and low frequency power (LF)). Random-effects model was used to calculate the pooled effect estimates.

Results

A total of 33 panel studies were included in our meta-analysis, with 16 studies conducted in North America, 12 studies in Asia, and 5 studies in Europe. The pooled results showed a 10 μg/m3 increase in PM2.5 exposure which was significantly associated with a − 0.92% change in SDNN (95% confidence intervals (95%CI) − 1.26%, − 0.59%), − 1.47% change in rMSSD (95%CI − 2.17%, − 0.77%), − 2.17% change in HF (95%CI − 3.24%, − 1.10%), and − 1.52% change in LF (95%CI − 2.50%, − 0.54%), respectively. Overall, subgroup analysis suggested that short-term exposure to PM2.5 was associated with lower HRV levels in Asians, healthy population, and those aged ≥ 40 years.

Conclusion

Short-term exposure to PM2.5 was associated with decreased HRV levels. Future studies are warranted to clarity the exact mechanism of exposure to PM2.5 on the cardiovascular system through disturbance of autonomic nervous function.
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Literature
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Metadata
Title
Acute effect of ambient fine particulate matter on heart rate variability: an updated systematic review and meta-analysis of panel studies
Authors
Zhiping Niu
Feifei Liu
Baojing Li
Na Li
Hongmei Yu
Yongbo Wang
Hong Tang
Xiaolu Chen
Yuanan Lu
Zilu Cheng
Suyang Liu
Gongbo Chen
Yuxiao Zhang
Hao Xiang
Publication date
01-12-2020
Publisher
BioMed Central
Published in
Environmental Health and Preventive Medicine / Issue 1/2020
Print ISSN: 1342-078X
Electronic ISSN: 1347-4715
DOI
https://doi.org/10.1186/s12199-020-00912-2

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