Table 3.
Electrocardiographic parameters in studied populations
| Parameter | Cases | Controls | p-value | |
|---|---|---|---|---|
| Heart rate (BPM) | Mean ± SD | 107.82±12.32 | 96.02±12.35 | 0.0001 |
| High | 8 (28.57%) | 3 (6.88%) | 0.009 | |
| Normal | 20 (71.43%) | 44 (93.62%) | ||
| Rhythm | Normal | 28 (100%) | 47 (100%) | 1.00 |
| p wave amplitude (mv) in Lead II | Mean ± SD | 0.12±0.01 | 0.12±0.01 | 0.17 |
| Normal | 28 (100%) | 47 (100%) | 1.00 | |
| p wave amplitude (mv) in Lead V1 | Mean ± SD | 0.11±0.005 | 0.11±0.004 | 0.66 |
| Normal | 28 (100%) | 47 (100%) | 1.00 | |
| p wave amplitude (mv) in Lead V2 | Mean ± SD | 0.11±0.006 | 0.11±0.005 | 0.77 |
| Normal | 28 (100%) | 47 (100%) | 1.00 | |
| P duration (ms) | Mean ± SD | 80.75±7.86 | 85.47±12.74 | 0.08 |
| Normal | 27 (96.43%) | 47 (100%) | 0.37 | |
| Low | 1 (3.57%) | 0 | ||
| PR interval | Mean ± SD | 123.96±17.03 | 130.32±17.99 | 0.14 |
| Normal | 28 (100%) | 47 (100%) | 1.00 | |
| QRS duration | Mean ± SD | 86.14±17.82 | 90.87±15.71 | 0.23 |
| Normal | 26 (92.86%) | 46 (97.87%) | 0.55 | |
| High | 2 (7.14%) | 1 (2.13%) | ||
| QT duration (ms) | Mean ± SD | 336.71±30.13 | 335.45±26.42 | 0.84 |
| Normal | 28 (100%) | 47 (100%) | 1.00 | |
| QTC duration (ms) | Mean ± SD | 431.39±43.60 | 415.17±25.24 | 0.04 |
| High | 11 (39.29%) | 2 (4.26%) | <0.0001 | |
| Normal | 17 (60.71%) | 45 (95.74%) | ||
| QRS axis | Mean ± SD | 56.61±22.08 | 56.32±22.62 | 0.81 |
| Normal | 28 (100%) | 47 (100%) | 1.00 | |