TABLE 2.

Cardiac repolarization parameters, exposure to 10 µg/m³ at rest, difference from baseline

ECG parameter/ exposure	During exposure	Hours after exposure				ANOVA
		0	3.5	15	21
QTc (msec)
Air	−8 ± 5	−11 ± 5	1 ± 3	−7 ± 12	3 ± 4	NS
UFP	−3 ± 4	−4 ± 4	−0.4 ± 7	−6 ± 11	0.8 ± 5
T- wave amplitude (µV)
Air	26 ± 19	43 ± 21	−44 ± 24	−44 ± 21	2 ± 18	NS
UFP	31 ± 17	23 ± 16	−50 ± 18	−37 ± 16	24 ± 12
PCA
Air	−3 ± 1	−0.7 ± 0.9	−0.06 ± 1.9	1.5 ± 1	−1 ± 1	NS
UFP	−3 ± 0.7	−0.4 ± 0.7	0.9 ± 0.5	0.5 ± 1	−0.8 ± 0.9
PCA variability
Air	0.21 ± 0.14	0.02 ± 0.16	0.07 ± 0.13	0.15 ± 0.10	0.04 ± 0.08	NS
UFP	0.37 ± 0.13	0.13 ± 0.08	0.61 ± 0.42	0.08 ± 0.11	0.37 ± 0.10
ST in lead II (µV)
Air	8 ± 5	−1 ± 3	−12 ± 4	3 ± 4	−1 ± 5	NS
UFP	10 ± 5	2 ± 3	−12 ± 2	10 ± 4	6 ± 4
ST in V2 (µV)
Air	−4 ± 2	−3 ± 3	−6 ± 4	−10 ± 5	−9 ± 4	NS
UFP	−2 ± 2	0 ± 2	−3 ± 2	−10 ± 4	−7 ± 4
ST in V5 (µV)
Air	−2 ± 4	−4 ± 3	−16 ± 6	−7 ± 6	−12 ± 7	NS
UFP	7 ± 2	4 ± 2	−7 ± 3	4 ± 3	0.3 ± 3