Table 2.
Electrocardiographic parameters in patients with IGT and age-matched controls.
| Control | Patients with IGT | |
|---|---|---|
| RR (ms) | 900 ± 144 | 914 ± 163 |
| PQ (ms) | 161 ± 18 | 162 ± 24 |
| QRS (ms) | 94 ± 9 | 94 ± 8 |
| QT (ms) | 402 ± 39 | 411 ± 43 |
| QTc (ms) Bazett | 424 ± 19 | 431 ± 25 |
| QTc (ms) Fridericia | 416 ± 23 | 424 ± 27 |
| QTc (ms) Framingham | 417 ± 22 | 424 ± 26 |
| QTc (ms) Hodges | 416 ± 25 | 424 ± 29 |
| QTd (ms) | 42 ± 17 | 44 ± 13 |
| Tpeak − Tend (ms) | 86 ± 14 | 88 ± 23 |
| T wave amplitude (μV) | 220 ± 119 | 225 ± 120 |
| STVRR (ms) | 18.5 ± 14.3 | 10.5 ± 6.7* |
| STVQT (ms) | 3.7 ± 0.7 | 5.0 ± 0.7** |
Values are represented as mean ± SD. Values are considered statistically significantly different at P < 0.05 (*), P < 0.0001 (**) compared with the control group. n = 18 in each group.
IGT, impaired glucose tolerance; QTc, frequency corrected QT interval (calculated by the Bazett’s, Fridericia, Framingham and Hodges formulas); QTd, QT dispersion; Tpeak − Tend, duration of the T wave from the peak to the end; STVRR, beat-to-beat short-term temporal variability of the RR interval; STVQT, beat-to-beat short-term temporal variability of the QT interval.