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Table 3 Electrolyte concentrations of K+ and iCa2+ in the four groups

From: Effects of dexmedetomidine on cardiac electrophysiology in patients undergoing general anesthesia during perioperative period: a randomized controlled trial

   GroupD1 (n = 16) GroupD2 (n = 18) GroupD3 (n = 18) GroupC (n = 17) Pa Pb Pc Pd Pe Pf
K+ (mmol/L) T1 3.73 ± 0.20 3.72 ± 0.23 3.68 ± 0.18 3.80 ± 0.19 0.968 0.547 0.286 0.562 0.255 0.090
T2 3.78 ± 0.19 3.76 ± 0.21 3.74 ± 0.20 3.82 ± 0.21 0.778 0.606 0.615 0.810 0.422 0.299
T5 3.83 ± 0.21 3.79 ± 0.23 3.71 ± 0.18 3.81 ± 0.20 0.669 0.098 0.855 0.202 0.805 0.134
T6 3.85 ± 0.21 3.85 ± 0.23 3.72 ± 0.24 3.82 ± 0.29  > 0.99 0.120 0.759 0.109 0.752 0.204
T7 3.88 ± 0.26 3.88 ± 0.30 3.83 ± 0.20 3.91 ± 0.25 0.969 0.587 0.733 0.604 0.696 0.368
PT1-2 0.841  > 0.99 0.474  > 0.99       
PT1-5 0.282 0.903  > 0.99  > 0.99       
PT1-6 0.104 0.057  > 0.99  > 0.99       
PT1-7 0.172 0.121 0.153 0.760       
PT2-5  > 0.99  > 0.99  > 0.99  > 0.99       
PT2-6  > 0.99 0.334  > 0.99  > 0.99       
PT2-7 0.739 0.280 0.916 0.827       
iCa2+ (mmol/L) T1 1.15 ± 0.07 1.14 ± 0.03 1.13 ± 0.06 1.14 ± 0.04 0.434 0.193 0.515 0.588 0.900 0.510
T2 1.15 ± 0.06 1.14 ± 0.04 1.14 ± 0.06 1.14 ± 0.02 0.510 0.488 0.389 0.972 0.826 0.856
T5 1.15 ± 0.05 1.13 ± 0.04 1.13 ± 0.06 1.12 ± 0.02 0.327 0.247 0.148 0.852 0.614 0.749
T6 1.15 ± 0.04 1.14 ± 0.04 1.15 ± 0.06 1.12 ± 0.03 0.752 0.833 0.151 0.588 0.244 0.091
T7 1.16 ± 0.05 1.15 ± 0.04 1.14 ± 0.06 1.13 ± 0.03 0.677 0.148 0.085 0.285 0.174 0.756
PT1-2  > 0.99  > 0.99 0.201  > 0.99       
PT1-5  > 0.99  > 0.99  > 0.99 0.747       
PT1-6  > 0.99  > 0.99 0.306 0.573       
PT1-7  > 0.99 0.828  > 0.99  > 0.99       
PT2-5  > 0.99  > 0.99  > 0.99 0.878       
PT2-6  > 0.99  > 0.99  > 0.99 0.435       
PT2-7  > 0.99  > 0.99  > 0.99  > 0.99       
  1. Data are expressed as mean ± SD
  2. T1 before dexmedetomidine infusion, T2 dexmedetomidine loading dose finish, T5 1 h after surgery beginning, T6 surgery ending, T7 1 h after entering PACU
  3. PT1-2, PT1-5, PT1-6, PT1-7 for comparisons between T1 and T2, T5, T6, T7; PT2-5, PT2-6, PT2-7 for comparisons between T2 and T5, T6, T7; Pa, Pb, Pc, Pd, Pe and Pf for comparisons between groups D1 and D2, groups D1 and D3, groups D1 and C, groups D2 and D3, groups D2 and C, and groups D3 and C, respectively