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| ECG abnormalities | Seropositives n (%) | Seronegatives n (%) | Gradient (%) |
|---|---|---|---|
| Ventricular extrasystoles | 12 (11.3) | 1 (0.9) | 10.4 |
| Bradycardia | 8 (7.5) | 6 (5.6) | 1.9 |
| LBBB (grade 3) | 8 (7.5) | 0 (0) | 7.5 |
| RBBB (grade 3) | 2 (1.9) | 0 (0) | 1.9 |
| RBBB (grade 1) | 2 (1.9) | 2 (1.9) | 0 |
| AV B (grade 1) | 2 (1.9) | 2 (1.9) | 0 |
| Flat T wave | 4 (3.8) | 0 (0) | 3.8 |
AV B: atrioventricular block; LBBB: left bundle branch block; RBBB: right bundle branch block.
