ECG data from nocturnal Holter ECG
| Total | PVCs ≤30·h−1 | PVCs >30·h−1 | p-value | |
| Subjects n | 239 | 134 | 105 | |
| ECG recording time h | 7.4 (6.7–8.0) | 7.5 (6.8–8.1) | 7.4 (6.6–7.9) | 0.268 |
| Nocturnal heart rate beats/min | 67 (60–74) | 65 (59–74) | 69 (63–75) | 0.047 |
| Ventricular arrhythmias/h TRT | ||||
| PVCs | 25 (2.5–77.4) | 3.3 (0.8–13.0) | 85.2 (48.6–241.7) | <0.001 |
| Ventricular couplets | 0.3 (0.0–2.4) | 0.0 (0.0–0.1) | 3.1 (0.7–7.5) | <0.001 |
| Higher grade ventricular arrhythmias n (%) | ||||
| >4% PVCs of TRT | 31 (13%) | 0 (0%) | 31 (30%) | <0.001 |
| >10 000 PVCs/24 h | 17 (7%) | 0 (0%) | 17 (16%) | <0.001 |
| ≥1 episode of non-sustained VT | 50 (21%) | 21 (16%) | 29 (28%) | 0.024 |
Values are median (interquartile range), or number of patients (%). Significant p-values (p<0.05) are marked in bold. PVC: premature ventricular complex; TRT: total recording time; VT: ventricular tachycardia.