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Changes in the frontal plane axis with the standard and modified positions
| Electrocardiographic axis in degrees for sinus rhythm subjects ECG | ||||||||
|---|---|---|---|---|---|---|---|---|
| Standard position (SLL) | Modified position (MLL) | Difference | ||||||
| Mean | SD | Range | Mean | SD | Range | M-S | P* | |
| QRS axis | 44.11 | 22.79 | -26 to 96 | -16.93 | 91.05 | -88 to 176 | -61.04 | <0.05 |
| T axis | 26.65 | 13.46 | 06 to 59 | 40.23 | 17.06 | 10 to 66 | 13.58 | <0.05 |
MLL - modified limb lead; SD - standard deviation; SLL - standard limb lead;
Paired sample t-test
