Table 3.
Clinical characteristics of the different ventricular extrasystole's origins.
| Variable | RVOT (n = 25) | Purkinje fibers (n = 69) | P-value |
|---|---|---|---|
| Age (y, mean ± SD) | 38 ± 11 | 38 ± 12 | 0.855 |
| Male (n, %) | 9 (43) | 24 (52) | 0.479 |
| No structural heart disease (n, %) | 25 (100) | 68 (99) | 1 |
| Family history of cardiac disease or sudden death (n, %) | 1 (5) | 7 (15) | 0.413 |
| Emotion and exercise (n, %) | 1 (4) | 4 (6) | 0.754 |
| First coupling interval (ms, mean ± SD) | 380 ± 70 | 274 ± 28 | <0.001 |
| QRS duration of ventricular extrasystole (ms, mean ± SD) | 147 ± 8 | 131 ± 17 | <0.001 |
| VF (n, %) | 12 (48) | 54 (78) | 0.005 |
| Electrical storm (n, %) | 0 (0) | 6 (9) | 0.295 |
| RFCA Monotherapy/Combination therapy (n, %) | 21 (84) | 36 (52) | 0.005 |
| ICD Monotherapy/Combination therapy (n, %) | 3 (12) | 55 (80) | <0.001 |
| Only medicines treatment (n, %) | 2 (8) | 12 (17) | 0.422 |
| Death (n, %) | 1 (4) | 5 (7) | 0.888 |
RVOT, Right ventricular outflow tract; SD, Standard deviation; VF, Ventricular fibrillation; RFCA, Radiofrequency catheter ablation; ICD, Implantable cardioverter defibrillator.