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Lanki, T.* ; Hoek, G.* ; Timonen, K. L.* ; Peters, A. ; Tiittanen, P.* ; Vanninen, E.* ; Pekkanen, J.*

Hourly variation in fine particle exposure is associated with transiently increased risk of ST segment depression.

Occup. Environ. Med. 65, 782-786 (2008)

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Open Access Green as soon as Postprint is submitted to ZB.

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Objectives: To evaluate whether hourly changes in fine particle (PM2.5, diameter, <2.5 mu m) exposure or outdoor particle concentrations are associated with rapid ischaemic responses. Methods: 41 non-smoking elderly people with coronary heart disease were followed up with biweekly clinic visits in Helsinki, Finland. The occurrence of ST segment depressions >0.1 mV was recorded during submaximal exercise tests. Hourly variations in personal PM2.5 exposure and outdoor levels of PM2.5 and ultrafine particles (<0.1 mu m) were recorded for 24 h before a clinic visit. Associations between particulate air pollution and ST segment depressions were evaluated using logistic regression. Results: Both personal and outdoor PM2.5 concentrations, but not outdoor ultrafine particle counts, were associated with ST segment depressions. The odds ratio (per 10 mu g/m(3)) for personal PM2.5 concentration during the hour preceding a clinic visit was 3.26 (95% CI 1.07 to 9.99) and for 4 h average outdoor PM2.5 it was 2.47 (95% CI 1.05 to 5.85). Conclusions: Even very short-term elevations in fine particle exposure might increase the risk of myocardial ischaemia. The precise mechanism is still unknown but could involve changes in autonomic nervous control of the heart.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords coronary-heart-disease; particulate air-pollution; elderly subjects; myocardial-infarction; rate-variability; ultrafine particles; inflammation; mortality; markers; matter

ISSN (print) / ISBN 1351-0711

e-ISSN 1470-7926

Journal Occupational and Environmental Medicine

Quellenangaben Volume: 65, Issue: 11, Pages: 782-786

Publisher BMJ Publishing Group

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Epidemiology (EPI)