Table 1.
Caucasian | Japanese | All | |
---|---|---|---|
LQT1 | 84 (59.2%) | 36 (43.9%) | 120 (53.6%) |
LQT2 | 56 (39.4%) | 46 (56.1%) | 102 (45.5%) |
LQT1+LQT2 | 2 (1.4%) | - | 2 (0.9%) |
Female | 74 (52.1%) | 43 (52.4%) | 117 (52.2%) |
Symptomatic | 39 (52.7%) | 26 (60.5%) | 65 (55.6%) |
Male | 68 (47.9%) | 39 (47.6%) | 107 (47.8%) |
Symptomatic | 32 (47.1%) | 15 (38.5%) | 47 (43.9%) |
Asymptomatic/Symptomatic gender | |||
Female/Female | 18 (25.4%) | 9 (22.0%) | 27 (24.1%) |
Male/Male | 15 (21.1%) | 7 (17.1%) | 22 (19.6%) |
Female/Male | 17 (23.9%) | 8 (19.5%) | 25 (22.3%) |
Male/Female | 21 (29.6%) | 17 (41.5%) | 38 (33.9%) |
Age at first ECG (years) | |||
Asymptomatic | 49 ± 12 | 48 ± 10 | 48 ± 11 |
Symptomatic | 19 ± 12 | 18 ± 9 | 19 ± 11 |
Cardiac events | |||
Syncope | 58 (81.7%) | 41 (100%) | 99 (88.4%) |
Cardiac arrest and/or sudden cardiac death | 13 (18.3%) | - | 13 (11.6%) |
Age at the time of the first cardiac event (years) | |||
All symptomatic patients | 14 ± 8 | 13 ± 5 | 13 ± 7 |
Female | 17 ± 9 | 13 ± 5 | 15 ± 7 |
Male | 11 ± 7 | 11 ± 5 | 11 ± 6 |
LQT1 | 12 ± 8 | 11 ± 5 | 12 ± 7 |
LQT2 | 17 ± 8 | 14 ± 5 | 16 ± 7 |
QTc (ms) | |||
Female | 480 ± 39 | 502 ± 50 | 483 ± 44 |
Male | 473 ± 47 | 496 ± 56 | 470 ± 49 |
Data presented as n (%) or mean ± SD