| Electrocardiogram abnormalities | N (%) |
| Left atrial hypertrophy | 69 (34.5) |
| Right atrial hypertrophie | 11 (5.5) |
| Left axis | 7 (3.5) |
| Tall T-Wave | 11 (12.09) |
| Q-Wave abnormality | 0 |
| Right branch block | 46 (23) |
| Left branch block | 0 |
| R/S > 1 | 0 |
| Under ST, T < 0 | 14 (15.28) |
| QTc > 0.44 | 4 (2) |
| Ventricular extrasystoles | 1 (0.5) |
| Supraventricular tachycardia, Flutter, Atrial fibrillation | 0 |
| Ventricular preexcitation | 1 (0.5) |
| Atrioventricular block 1 | 35 (17.5) |
| Atrioventricular block 2 | 3 (1.5) |
| Atrioventricular block 3 | 0 |
| Sinus bradycardia < 40 bpm | 2 (1) |