General Anaesthesia Regional Anaesthesia and Monitored Anaesthesia Care
  Group 1 (Prolonged) Group 2 (Normal) Group 3 (Prolonged) Group 4 (Normal)
Preoperative QTc (msec) 426 ± 15 416 ± 18 428 ± 13 408 ± 24
Postoperative QTc (msec) 472 ± 22 425 ± 18 460 ± 17 415 ± 22
Change in QTc (msec) 46 ± 22 8 ± 19 29 ± 22 8 ± 19
All data were expressed as mean ± SD
Table 2: Changes in QTc interval.