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Table 3 Analyses of ECG waves among all groups

From: Crocin attenuates cigarette smoke-induced lung injury and cardiac dysfunction by anti-oxidative effects: the role of Nrf2 antioxidant system in preventing oxidative stress

Parameters Control Crocin COPD COPD + Crocin
HR (bpm) 232.12 ± 11.46 237.50 ± 10.95 246.62 ± 15.81* 242.75 ± 6.13
RR Interval (S) 0.259 ± 0.01 0.253 ± 0.01 0.247 ± 0.006* 0.250 ± 0.01
QT Interval (ms) 61.15 ± 1.18 60.58 ± 0.76 58.65 ± 1.92** 60.82 ± 1.17
QTc (ms) 119.69 ± 3.83 120.49 ± 1.99 118.94 ± 7.37 122.33 ± 2.87
QRS Complex (ms) 12.73 ± 0.45 12.51 ± 0.43 11.35 ± 0.84*** 12.92 ± 0.44††
QRS Complex (mv) 0.53 ± 0.04 0.53 ± 0.06 0.49 ± 0.03 0.51 ± 0.04
ST Segment (ms) 14.39 ± 0.34 14.33 ± 0.45 13.71 ± 0.41* 14.52 ± 0.52††
  1. *P < 0.05, **P < 0.01 and ***P < 0.001, vs. Control, P < 0.05 and ††P < 0.01 vs. COPD. All the groups were statistically compared by ANOVA followed by Tukey’s multiple comparison. Data are expressed as the mean + SEM, n = 8