Table 4.
Electrocardiographic and Demographic Parameters with Respect to Genotype and Age
| E1784K+ | E1784K− | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| H558R+ | H558R− | H558R+ | H558R− | |||||||||
| <40 n=4 | ≥40 n=5 | P Value | <40 n=7 | ≥40 n=1 | P Value | <40 n=8 | ≥40 n=1 | P Value | <40 n=5 | ≥40 n=4 | P Value | |
| Male sex | 2 | 3 | 1.0 | 3 | 0 | 1.0 | 7 | 0 | — | 3 | 2 | 1.0 |
| Age, y | 18.5±5.6 | 48.3±3.7 | 0.0001 | 21.6±8.3 | 54.4 | 0.25 | 14.9±5.1 | 42.1 | 0.02 | 28.6±5.1 | 55.1±3.6 | 0.22 |
| RR, ms | 718±154 | 1065±89 | 0.02 | 854±246 | 1467 | 0.25 | 818±109 | 845 | 0.56 | 867±95 | 960±166 | 1.0 |
| PR, ms | 176±8 | 233±21 | 0.02 | 177±15 | 225 | 0.25 | 154±15 | 160 | 0.7 | 161±14.7 | 182±12 | 1.0 |
| QRS, ms | 89±17 | 111±25 | 0.286 | 98 ±16 | 106 | 05 | 79±7 | 73 | 1.0 | 92±12 | 101±13 | 0.22 |
| QTc, ms | 461±19 | 465±17 | 1.0 | 467±13 | 495 | 0.25 | 411±15 | 417 | 0.73 | 400±23 | 407±18 | 0.67 |
| QT dispersion, ms | 32±15 | 53±19 | 0.06 | 38±25 | 22 | 0.75 | 25± | 41 | 0.11 | 19±10 | 39±15 | 0.22 |
| QTp‐e dispersion, ms | 34±24 | 50±23 | 0.29 | 51±27 | 50 | 1.0 | 34±4 | 45 | 0.19 | 26±12 | 39±14 | 0.44 |
| ST elevation in V1, mV | 0 | 0.09±0.09 | 0.19 | 0.01±0.04 | 0.2 | 0.25 | 0.01±0.03 | 0 | 0.56 | 0 | 0.02±0.05 | 1.0 |
| ST elevation in V2, mV | 0 | 0.05±0.05 | 0.19 | 0.03±0.07 | 0.2 | 0.25 | 0 | 0 | 0.56 | 0 | 0.02±0.07 | 1.0 |
| ST elevation in V3, mV | 0 | 0.02±0.04 | 0.73 | 0.01±0.04 | 0.15 | 0.25 | 0 | 0 | 0.56 | 0 | 0.02±0.04 | 1.0 |
| Brugada type II/III | 0 | 4 (80%) | 0.02 | 0 | 1 | 0.005 | 0 | 0 | 1.0 | 0 | 0 | 1.0 |
| Ajmaline positive | 1/3 | 5/5 | 0.17 | 6/6 | 1/1 | 1.0 | 0/6 | 0/1 | 1.0 | 0/2 | 0/2 | 1.0 |