Relative error (%) for QT dispersion and ECG measurements
| Supine | Standing | p value | |
|---|---|---|---|
| Global QT dispersion | 30.3 (26.6) | 28.9 (24.9) | NS |
| Precordial QT dispersion | 31.0 (27.4) | 34.4 (28.1) | NS |
| Global QT standard deviation | 27.9 (23.5) | 27.1 (24.4) | NS |
| Precordial QT standard deviation | 27.4 (26.9) | 32.6 (26.3) | NS |
| Heart rate | 7.9 (6.5) | 7.9 (7.6) | NS |
| PR interval | 3.0 (2.7) | 3.6 (3.2) | NS |
| QRS duration | 2.6 (2.3) | 2.7 (2.1) | NS |
| QT interval | 3.8 (3.1) | 3.6 (3.5) | NS |
| QTc interval | 1.8 (1.5) | 1.9 (1.4) | NS |
Values are mean (SD).