Table 2.
RR interval, QT intervals, and QT dispersion
| Group A | Group B | Group C | Group D | |
| RR interval (ms) | 907 (185) | 969 (190) | 960 (146) | 970 (132) |
| QTc interval (ms) | ||||
| Max | 449 (22) | 447 (31) | 440 (20) | 426 (26) |
| Min | 375 (16) | 382 (35) | 402 (24) | 395 (27) |
| QTpc interval (ms) | ||||
| Max | 348 (28) | 354 (18) | 357 (21) | 352 (28) |
| Min | 297 (9) | 297 (32) | 308 (27) | 305 (26) |
| QRS duration (ms) | ||||
| Max | 105 (12) | 100 (13) | 97 (10) | 97 (7) |
| Min | 84 (9) | 85 (11) | 82 (10) | 83 (5) |
| Tpc interval (ms) | ||||
| Max | 128 (30) | 128 (32) | 112 (29) | 113 (22) |
| Min | 52 (12) | 60 (17) | 65 (16) | 55 (14) |
| JTc interval (ms) | ||||
| Max | 353 (27) | 353 (29) | 350 (23) | 336 (28) |
| Min | 274 (23) | 286 (33) | 311 (26) | 300 (32) |
| Dispersion (ms) | ||||
| Qtc | 74 (24)*† | 65 (28)*† | 39 (17) | 31 (15) |
| Qtpc | 51 (27) | 57 (27) | 48 (21) | 46 (23) |
| QRS | 21 (11) | 15 (9) | 15 (9) | 14 (7) |
| Tpc | 77 (32) | 68 (33) | 48 (28) | 58 (20) |
| JTc | 79(37)*‡ | 67 (26)*‡ | 40 (18) | 36 (19) |
Values are mean (SD).
*p < 0.01 v group C; †p < 0.001 v group D; ‡p < 0.01 v group D.
JTc, corrected interval from the J point to the end of the T wave; Max, maximum; Min, minimum; QTc, corrected QT; QTpc, corrected interval from the onset of the QRS complex to the peak of the T wave; Tpc, corrected interval from the peak to the end of the T wave.