Table 2A: Electrocardiograms abnormalities according to sex and age group: rhythm abnormalities, atrioventricular block and intraventricular conduction defects (n = 264,324).
| Age group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Abnormalities | 20-39.9 years | 40-59.9 years | 60-79.9 years | > 80 years | ||||||||
| F (n = 35,463) | M (n = 20,922) | P | F (n = 61,911) | M (n = 37,555) | P | F (n = 42,501) | M (n = 31,973) | P | F (n = 7,596) | M (n = 5,685) | P | |
| Rhythm disorders | ||||||||||||
| Sinus rhythm | 33,855 (95.46%) | 19,736 (94.33%) | < 0.001 | 59,228 (95.66%) | 35,325 (94.06%) | < 0.001 | 39,623 (93.2%) | 28,978 (90.6%) | < 0.001 | 6,662 (87.7%) | 4,757 (83.7%) | < 0.001 |
| Ectopic atrial rhythm | 84 (0.23%) | 43 (0.20%) | 0.448 | 98 (0.15) | 76 (0.20) | 0.107 | 73 (0.2%) | 85 (0.3%) | 0.006 | 23 (0.3%) | 22 (0.4%) | 0.450 |
| Multifocal atrial rhythm | 1 (0.002%) | 1 (0.004%) | 0.706 | 3 (0.0%) | 4 (0.0%) | 0.290 | 8 (0.0%) | 9 (0.0%) | 0.466 | 4 (0.1%) | 3(0.1%) | 1.000 |
| Pacemaker | 20 (0.05%) | 24 (0.11%) | 0.017 | 130 (0.20%) | 106 (0.28%) | 0.023 | 245 (0.6%) | 185 (0.6%) | 1.000 | 75 (1.0%) | 78 (1.4%) | 0.048 |
| Junctional rhythm | 18 (0.05%) | 15 (0.07%) | 0.321 | 40 (0.06%) | 23 (0.06%) | 0.838 | 46 (0.1%) | 56 (0.2%) | 0.016 | 18 (0.2%) | 16 (0.3%) | 0.611 |
| Atrial fibrillation and flutter | 49 (0.13%) | 49 (0.23%) | 0.008 | 336 (0.54%) | 448 (1.19%) | < 0.001 | 1,188 (2.8%) | 1,429 (4.5%) | < 0.001 | 527(6.9%) | 586 (10.3%) | < 0.001 |
| Supraventricular extrasystole and ventricular extrasystole | 5 (0.014%) | 2 (0.009%) | 0.640 | 25 (0.04%) | 20 (0.05%) | 0.355 | 64 (0.2%) | 71 (0.2%) | 0.029 | 45 (0.6%) | 49 (0.9%) | 0.075 |
| Supraventricular extrasystole | 213 (0.60%) | 145 (0.69%) | 0.182 | 458 (0.73) | 356 (0.94%) | < 0.001 | 1,109 (2.6%) | 1,228 (3.8%) | < 0.001 | 505 (6.6%) | 464 (8.2%) | 0.001 |
| Ventricular extrasystole | 253 (0.71%) | 148 (0.70%) | 0.934 | 897 (1.44%) | 668 (1.77%) | < 0.001 | 1,489 (3.5%) | 1,589 (5.0%) | < 0.001 | 480 (6.4%) | 521 (9.2%) | < 0.001 |
| Atrioventricular (AV) blocks | ||||||||||||
| AV block 1 | 185 (0.52%) | 183 (0.87%) | < 0.001 | 533 (0.86%) | 627 (1.66%) | < 0.001 | 939 (2.2%) | 1,257 (3.9%) | < 0.001 | 396 (5.2%) | 457 (8.0%) | < 0.001 |
| AV 2:1 advanced | 6 (0.0169%) | 8 (0.038%) | 0.121 | 15 (0.02%) | 35 (0.09%) | < 0.001 | 36 (0.1%) | 45 (0.1%) | 0.024 | 20 (0.3%) | 20 (0.4%) | 0.425 |
| Complete AV block | 5 (0.014%) | 7 (0.03%) | 0.128 | 16 (0.02%) | 16 (0.04%) | 0.153 | 33 (0.1%) | 28 (0.1%) | 0.700 | 17 (0.2%) | 22 (0.4%) | 0.104 |
| AV block 2 | 6 (0.0169%) | 7 (0.03%) | 0.211 | 12 (0.019%) | 29 (0.07%) | < 0.001 | 28 (0.1%) | 36 (0.1%) | 0.042 | 16 (0.2%) | 15 (0.3%) | 0.590 |
| AV block 2:1 | 0 | 0 | 3 (0.004%) | 8 90.02%) | 0.017 | 10 (0.0%) | 9 (0.0%) | 0.818 | 4 (0.1%) | 6 (0.1%) | .343 | |
| Intraventricular blocks | ||||||||||||
| Left anterior hemiblock | 370 (1.04%) | 502 (2.39%) | < 0.001 | 2,198 (3.55%) | 2,542 (6.76%) | < 0.001 | 3,566 (8.4%) | 4,545 (14.2%) | < 0.001 | 1,004 (13.2%) | 1,144 (20.1%) | < 0.001 |
| Left posterior hemiblock | 139 (0.39%) | 187 (0.89%) | < 0.001 | 114 (0.18%) | 154 (0.41%) | < 0.001 | 103 (0.2%) | 118 (0.4%) | 0.002 | 22 (0.3%) | 16 (0.3%) | 0.997 |
| Complete right bundle branch block | 296 (0.83%) | 331 (1.58%) | < 0.001 | 1,360 (2.19%) | 1,258 (3.34%) | < 0.001 | 1,804 (4.2%) | 1,982 (6.2%) | < 0.001 | 474 (6.2%) | 558 (9.8%) | < 0.001 |
| Complete left bundle branch block | 46 (0.129%) | 38 (0.18%9) | 0.123 | 580 (0.93%) | 3,389 (0.90%) | 0.556 | 1,408 (3.3%) | 935 (2.9%) | 0.003 | 480 (6.32%) | 317 (5.58%) | 0.077 |
F = female examinations; M = male examinations; P = P-value.