Table 1.
Characteristics of the 38 Patients in the Study Population
| Value | |
|---|---|
| Female, percent | 89.5 |
| QTc (ms) | 0.51 ± 0.06 |
| LQTS genotype, percent | |
| LQT1 (n = 8) | 21.1 |
| LQT2 (n = 7) | 18.4 |
| LQT3 (n = 3) | 7.9 |
| Unknown (n = 20) | 52.6 |
| Cardiac event | |
| Age at cardiac event, year | 32.5 ± 17.2 |
| 1st cardiac event, percent | 21.1 |
| Number of cardiac events | 6.3 ± 7.0 |
| Cardiac event type | |
| Syncope (n = 24) | 63.2 |
| Aborted cardiac arrest (n = 1) | 2.6 |
| ICD shock (n = 13) | 34.2 |
| Chronology of event date and control date | |
| Control before event, percent | 52.6 |
| Days between event date and control date (absolute value) | 342 ± 133 |
| Number of days from interview | |
| Control occasion (mean) | 515 ±179 |
| Control occasion (median) | 481 |
| Cardiac event (mean) | 520 ± 340 |
| Cardiac event (median) | 510 |
| Beta‐blockers, percent | |
| Day of cardiac event | 60.5 |
| Control occasion | 60.5 |
Plus‐minus values are mean ± standard deviation.