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. Author manuscript; available in PMC: 2010 May 11.
Published in final edited form as: Inhal Toxicol. 2009 Feb;21(3):223–233. doi: 10.1080/08958370802492407

TABLE 3.

Heart rate variability, exposures to 10 and 25 µg/m3 with exercise, difference from baseline

ECG parameter/
exposure		 During
exposure		 Hours after exposure
 ANOVA
0 3.5 15 21
RR (msec)
    Air −300 ± 40 −110 ± 35 −117 ± 37 63 ± 53 −22.8 ± 30 UFP × gender:
    10 µg/m3 −275 ± 26 −84 ± 26 −91 ± 28 77 ± 35 27 ± 19 p = 0.019
    25 µg/m3 −333 ± 50 −70 ± 44 −101 ± 30 37 ± 54 −72 ± 29
SDNN (msec)
    Air −12 ± 12 3 ± 6 −7 ± 12 −9 ± 13 7 ± 7 UFP:
    10 µg/m3 15 ± 10 5 ± 4 7 ± 8 3 ± 5 12 ± 7 p = 0.013
    25 µg/m3 −17 ± 15 4 ± 17 −18 ± 13 −11 ± 15 −6 ± 7
rMSSD (msec)
    Air −33 ± 13 11 ± 15 −20 ± 17 −5 ± 18 5 ± 7 NS
    10 µg/m3 −8 ± 7 −3 ± 4 −2 ± 10 12 ± 7 14 ± 10
    25 µg/m3 −33 ± 19 −3 ± 23 −30 ± 18 −9 ± 20 −12 ± 6
Low frequency (Hz)
    Air −622 ± 249 −583 ± 438 −354 ± 499 −272 ± 531 −41 ± 303 UFP × gender:
    10 µg/m3 380 ± 388 480 ± 329 534 ± 416 345 ± 287 389 ± 219 p = 0.002
    25 µg/m3 — 147 ± 1657 — −961 ± 1153 −436 ± 695
High frequency (Hz)
    Air — — — — 518 ± 506 UFP × gender:
    10 µg/m3 −383 ± 151 175 ± 197 −32 ± 221 470 ± 323 1418 ± 1056 p = 0.011
    25 µg/m3 — 100 ± 2071 — — −111 ± 252
Low frequency/High frequency
    Air 3 ± 1 −0.4 ± 0.6 0.1 ± 0.9 −0.5 ± 0.9 −1.3 ± 0.9 UFP:
    10 µg/m3 3 ± 0.6 0.5 ± 0.3 1 ± 0.4 0 ± 0.3 −0.3 ± 0.2 p <0.0001
    25 µg/m3 2 ± 1 −0.5 ± 1 −0.1 ± 1 −0.9 ± 0.8 −0.2 ± 0.4