Table 2.
Heart rate (beats/min) of the experimental and control groups during the operation and in recovery room
| Heart rate | Experimental group | Control group | P value |
|---|---|---|---|
| HR5† | 82.0±11.2 | 93.1±10.6 | 0.0001 |
| HR10† | 84.3±8.7 | 94.0±12.2 | 0.0001 |
| HR20† | 79.3±8.4 | 78.8±6.9 | 0.78 |
| HR30† | 78.3±7.1 | 81.3±7.9 | 0.08 |
| HR60† | 78.9±6.9 | 77.7±6.5 | 0.44 |
| HR R15‡ | 78.0±7.9 | 78.4±8.2 | 0.84 |
| HR R30‡ | 78.4±10.5 | 89.0±11.4 | 0.0001 |
†Heart rate at 5, 10, 20, 30 and 60 minutes after the injection of meperidine (in the experimental group) or normal saline (in the control group); ‡Heart rate at minutes 15 and 30 of arrival in recovery room