Fig. 6

Changes in cardiac repolarization during and after 20-min stress tests at 2 days, 5 weeks, and 10 weeks after PEPs (a-f). Values are means ± standard errors of changes from 20-min pre-stress periods on 2, 35, and 70 days after cessation of inhalation exposures during Mid- and Post-Stress periods (20 min each) for each group, PEPs n = 4, Air n = 4. ^#P < 0.10 and *P < 0.05 vs. Air. Group means of each animal’s average pre-stress values (across the three stress test days) ± SEM for Air and PEPs groups, respectively: Tamp = 0.060 ± 0.006 and 0.054 ± 0.007 mV; ST Area = − 0.822 ± 0.074 and − 0.807 ± 0.053 mV*ms; QT = 61.4 ± 4.1 and 56.9 ± 4.3 ms; QTc = 60.8 ± 4.2 and 56.4 ± 2.5 ms; TpTe = 32.6 ± 3.9 and 25.9 ± 2.1 ms; TpTe/QT = 0.51 ± 0.03 and 0.44 ± 0.01