Table 3.
Electrocardiographic characteristics of the study population at baseline and new abnormalities at follow-up.
| CD patients (n = 31) | Control patients (n = 124) | p-value | |
|---|---|---|---|
| ECG at admission | 10 (32.3%) | 32 (26.0%) | 0.637 |
| Sinus rhythm | 4 (40.0%) | 22 (68.8%) | 0.142 |
| Atrial fibrillation or flutter | 4 (40.0%) | 7 (21.9%) | 0.410 |
| Pacemaker | 2 (20.0%) | 1 (3.1%) | 0.136 |
| Right bundle branch block | 1 (10.0%) | 4 (12.5%) | > 0.999 |
| Left bundle branch block | 2 (20.0%) | 1 (3.1%) | 0.136 |
| Left ventricular hemiblock | 0 (0.0%) | 0 (0.0%) | |
| New electrocardiographic abnormalities* | N* = 4 (12.9%) | N* = 15 (12.3%) | > 0.999 |
| Rhythm | |||
| Atrial fibrillation or flutter | 4 (100.0%) | 6 (40.0%) | 0.087 |
| Pacemaker | 1 (25.0%) | 0 (0.0%) | 0.211 |
| Multifocal atrial rhythm | 0 (0.0%) | 1 (6.7%) | > 0.999 |
| Supraventricular tachycardia | 0 (0.0%) | 1 (6.7%) | > 0.999 |
| Monomorphic ventricular tachycardia | 0 (0.0%) | 3 (20.0%) | > 0.999 |
| Polymorphic ventricular tachycardia | 0 (0.0%) | 1 (6.7%) | > 0.999 |
| No new rhythm abnormalities | 0 (0.0%) | 4 (26.7%) | 0.530 |
| New long QTc interval | 1 (25.0%) | 2 (13.3%) | 0.530 |
| None | 2 (50.0%) | 4 (26.7%) | 0.557 |
*New electrocardiographic abnormalities through in-hospital follow-up, and number of patients in which this outcome was assessed. CD Chagas disease, ECG electrocardiogram, QTc corrected QT interval.