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Table 2 Heart Rate Variability in subjects at the beginning of and after 5-h exposure in a chamber with or without filtration of inlet air from an urban street

From: Controlled exposure to particulate matter from urban street air is associated with decreased vasodilation and heart rate variability in overweight and older adults

Exposure

Particle filtered air

Non-filtered air

 

After entry

After 5 h

After entry

After 5 h

SDNN, ms

68 (41;115)

48 (27;82)

60* (31;116)

52 (26;99)

HFn

28 (16;55)

31 (10;58)

30 (11;69)

29 (13;54)*

LFn

68 (27;89)

66 (30;90)

66 (27;90)

70 (37;86)#

LF/HF ratio

2.4 (0.6;5)

2.1 (0.5;10)

2.3 (0.4;8)

2.5 (0.8;7)

  1. *p < 0.05 (decrease), #p = 0.027 (increase), SDNN: standard deviation of the beat-to-beat interval; HFn: High frequency, normalised units; LFn: Low frequency, normalized units. Values are medians (5th;95th percentiles).
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Particle and Fibre Toxicology

ISSN: 1743-8977

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