Table 1.

Baseline characteristics of all SQTS cohorts (treated with or without drug).

Study	(El-Battrawy et al., 2018)	(Bun et al., 2012)	(Mazzanti et al., 2017)	(Guistetto et al., 2011)	(Villafane et al., 2013)	(Suzuki et al., 2014)	(Guistetto et al., 2015)
Variables	n = 17	n = 1	n = 17	n = 53	n = 25	n = 1	n = 3
Age, median	34	28	29	26	15	10	21
Male, n (%)	8 (48%)	1 (100%)	14 (82%)	40 (75%)	21 (84%)	1 (100%)	1 (33%)
Female, n (%)	9 (52%)	0 (0%)	3 (18%)	13 (25%)	4 (16%)	0 (0%)	2 (66%)
Symptoms, n (%)
Syncope	5 (29%)	0 (0%)	0 (0%)	8 (15%)	4 (16%)	0 (0%)	0 (0%)
Palpitation	8 (47%)	0 (0%)	0 (0%)	13 (24%)	4 (16%)	0 (0%)	0 (0%)
SCA	2 (12%)	1 (100%)	6 (35%)	18 (34%)	6 (24%)	0 (0%)	1 (33%)
Atrial flutter	2 (11%)	0 (0%)	0 (0%)	0(0%)	0 (0%)	0 (0%)	0 (0%)
Atrial fibrillation	7 (41%)	0 (0%)	0(0%)	0 (0%)	4 (16%)	0 (0%)	0 (0%)
nsVT	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	2 (66%)
Ventricular ectopy	0 (0%)	0 (%)	0 (= %)	6 (11%)	0(%)	0(0%)	1(33%)
Asymptomatic	0 (0%)	0 (0%)	11 (64%)	0 (0%)	0 (0%)	1 (100%)	0 (0%)
Medical treatment, n (%)
Yes	8 (47%)	1 (100%)	17 (100%)	22 (41%)	10 (40%)	1 (100%)	3 (100%)
ICD implantation, n (%)
yes	5 (29%)	1 (100%)	9 (53%)	24(45%)	11 (44%)	0 (0%)	1 (33%)
Genetic screening, n (%)
CaCNB2B	6 (35%)	0 (0%)	0 (0%)	2 families	0 (0%)	0 (0%)	0 (0%)
CaCNA1C	3 (17%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)
KCNH2	4 (23%)	0 (0%)	0 (0%)	11(20%)	2 (8%)	1 (100%)	3 (100%)
KCNQ1	0 (0%)	0 (0%)	1 (6%)	0 (0%)	1 (4%)	0 (0%)	0 (0%)
KCNJ2	0 (0%)	0 (0%)	1 (6%)	0 (0%)	2 (8%)	0 (0%)	0 (0%)