Table 1.

The clinical characteristics of patients with Brugada syndrome and long QT syndrome

No	DS	Sex	Age (years)	Onset of age (years)	Ventricular arrhythmia	Symptoms	ICD therapy	Drugs	Familial history
1	Brs	F	40	38	VT	Dizzy, syncope	refused	Beta blocker	No
2	LQTs	F	61	55	VF	Syncope	ICD	Beta blocker	No
3	Brs	M	72	65	VT	Syncope	refused	Beta blocker	Brother (SCD, 31-year-old)
4	Brs	M	48	47	VF	Amaurosis, syncope	ICD	No	No
5	Brs	M	46	45	VT, VF	Dizzy, amaurosis, syncope	ICD	No	No
6	Brs	M	60	57	VT, VF	Syncope	ICD	Beta blocker, mexiletine	No
7	Brs	M	57	47	No	Syncope	refused	No	Three brothers (Brs)
8	Brs	M	41	13	VF	Syncope	ICD	No	No
9	Brs	M	49	47	VT	Palpitation, chest distress	ICD	No	No
10	Brs	M	63	53	EPS induced VF	Dizzy, amaurosis,	ICD	No	No
11	Brs	M	22	22	VF	Syncope	ICD	No	No
12	Brs	F	51	51	VF	Syncope when wake up	ICD	No	No
13	LQTs	F	13	6	Tdp, VF	Sleeping syncope	ICD	Mexiletine	No
14	LQTs	F	19	16	VF	Palpitation, amaurosis, Syncope	ICD	Beta blocker, potassium magnesium aspartate	No
15	Brs	M	41	34	VF	Syncope	ICD	Beta blocker	No
16	Brs	M	54	53	EPS induced VF	Amaurosis, palpitation	ICD	No	No
17	Brs	M	32	31	VT, VF	Syncope, convulsion	ICD	Beta blocker, potassium	No
18	Brs	M	33	23	No	No	ICD	No	No
19	LQTs	F	35	30	VF	Syncope	ICD	Beta blocker	No
20	Brs	M	41	30	VF, AF	Amaurosis, syncope	ICD	No	No
21	LQTs	F	16	14	VF	Amaurosis, syncope	ICD	Beta blocker, pacing rate of 95 bpm	No
22	LQTs	F	16	12	VF	Syncope, chest distress	ICD	No	Mother (SCD, 33-year-old)

DS diseases, M male, F female, AF atrial fibrillation, VT ventricular tachycardia, VF ventricular fibrillation, Tdp torsades de pointes, EPS electrophysiology study, SCD sudden cardiac death, ICD Implantable Cardioverter-Defibrillator,- loss of follow-up or lack of clinical data due to refuse of hospitalization