Table 2. Comparisons of the geometric analysis indicators before and after the drug administration.
| Indicators in each protocol | Pre | Post | T | |||
| median | range | median | range | |||
| Propranolol | ||||||
| SD1 (ms) | 388.81 | 198.03~557.70 | 347.98 | 187.83~558.58 | 4.00 | |
| SD2 (ms) | 250.25 | 119.86~403.80 | 302.22 | 101.67~388.86 | 3.00 | |
| SD1/SD2 | 1.56 | 1.38~1.65 | 1.36 | 1.07~1.85 | 3.00 | |
| SD1 × SD2 | 311.92 | 154.06~474.55 | 323.96 | 138.19~466.06 | 4.00 | |
| Atropine | ||||||
| SD1 (ms) | 380.03 | 212.67~527.13 | 32.69 | 9.70~109.02 | 0.00a | |
| SD2 (ms) | 244.49 | 169.98~350.60 | 17.31 | 4.97~39.48 | 0.00a | |
| SD1/SD2 | 1.47 | 1.25~1.66 | 2.28 | 1.45~4.63 | 1.00 | |
| SD1 × SD2 | 304.62 | 190.13~429.90 | 22.94 | 7.24~65.60 | 0.00a | |
| Propranolol–atropine | ||||||
| SD1 (ms) | 305.30 | 185.55~532.83 | 35.21 | 14.76~64.60 | 0.00a | |
| SD2 (ms) | 194.40 | 120.86~330.15 | 7.83 | 5.44~57.77 | 0.00a | |
| SD1/SD2 | 1.57 | 1.54~1.61 | 3.16 | 1.12~6.99 | 2.00 | |
| SD1 × SD2 | 243.62 | 149.75~419.42 | 14.73 | 11.29~61.09 | 0.00a | |
All the data are expressed as the median and range
aValue is significantly (T = 0) different before and after the drug administration.
SD1 = deviation perpendicular to the major axis; SD2 = standard deviation along the major axis