Table 1.
Baseline characteristics of the participants (n = 370)
| Characteristics | |
|---|---|
| Age, years, mean (SD) | 43.5 ± 15.9 |
| Female sex, n (%) | 125 (33.8) |
| Proband status, n (%) | 229 (61.9) |
| Family history of BrS, n (%) | 111 (30.1) |
| Family history of SCD, n (%) | 101 (27.3) |
| Spontaneous Brugada type 1 ECG, n (%) | 150 (40.5) |
| Shanghai score, median (IQR) | 4 (3.5–5.5) |
| Genetic test, n (%) | 201 (54.3) |
| SCN5A P/LP variant, n (%) | 58/201 (29.4) |
| VF induction during EP study, n (%) | 18/224 (8.0) |
| HV during EP study, ms mean (SD) | 42.1 ± 6.2 |
| cSNRT during EP study, ms, mean (SD) | 421.3 ± 49.1 |
| Symptoms before ILR, n (%) | |
| Syncope | 190 (51.4) |
| Palpitations | 84 (22.7) |
| Any symptoms (all of the above) | 274 (74.1) |
| No symptoms | 96 (25.9) |
| Syncope characterization before ILR | |
| Suspected arrhythmic, n (%) | 9 (4.7) |
| Unexplained, n (%) | 181 (95.3) |
| Time from syncope to ILR, months, median (IQR) | 1.9 (0.3–18.2) |
Continuous variables are shown as mean ± SD or median (IQR). Discrete variables are presented as n (%).
Abbreviations: AF, atrial fibrillation; EP, electrophysiological; ILR, implantable loop recorder; IQR, interquartile range; SCD, sudden cardiac death; SD, standard deviation; VF, ventricular fibrillation; P, pathogenic, LP, likely pathogenic; cSNRT, corrected sinus node recovery time.