Table 1.
Comparison of baseline characteristics, PVC morphology on ECG, and prevalence of PVC-induced myopathy according to age groups
| Variable | Children (n = 120) | Adults (n = 104) | P-value* |
|---|---|---|---|
| Age (years) | 14 (6) | 43.5 (24) | |
| Gender | |||
| - Female | 55 (45.8%) | 55 (52.9%) | |
| - Male | 65 (54.2%) | 49 (47.1%) | |
| Weight (Kg) | 58 (26) | 75 (22) | |
| Symptoms | 0.003* | ||
| - Palpitations | 81 (67.5%) | 84 (80.8%) | |
| - Chest pain | 14 (11.7%) | 11 (10.6%) | |
| - Dyspnea | 6 (5%) | 8 (7.7%) | |
| - Syncope | 19 (15.8%) | 1 (0.9%) | |
| - Dizziness | 0 (0%) | 0 (0%) | |
| - Cardiac arrest | 0 (0%) | 0 (0%) | |
| PVC burden percentage (%), mean ± SD | 24.2 ± 8.3 | 26.4 ± 9.3 | 0.053 |
| PVCs provisional localization | 0.001* | ||
| - Outflow tract | 111 (92.5%) | 72 (69.2%) | |
| - Non-outflow tract | 9 (7.5%) | 32 (30.8%) | |
| PVCs precise localization (on ECG) | < 0.001* | ||
| - AMC | 3 (2.5%) | 9 (8.7%) | |
| - LCC | 23 (19.2%) | 14 (13.5%) | |
| - LV summit | 2 (1.7%) | 16 (15.4%) | |
| - Papillary muscle | 1 (0.8%) | 3 (2.9%) | |
| - Parahisian | 0 (0%) | 2 (1.9%) | |
| - RCC | 10 (8.3%) | 7 (6.7%) | |
| - RCC-LCC junction | 15 (12.5%) | 4 (3.8%) | |
| - RVOT-free wall | 48 (40%) | 12 (11.5%) | |
| - RVOT septal | 15 (12.5%) | 35 (33.7%) | |
| - Tricuspid annulus | 3 (2.5%) | 2 (1.9%) | |
| - Total | 120 (100%) | 104 (100%) | |
| BBB morphology | 0.031* | ||
| - LBBB like | 113 (94.2%) | 89 (85.6%) | |
| - RBBB like | 7 (5.8%) | 15 (14.4%) | |
| Left Ventricular EF | 0.149 | ||
| - Normal EF | 118 (98.3%) | 98 (94.2%) | |
| - Impaired EF (< 50) | 2 (1.7%) | 6 (5.8%) |