Table 2.

Twelve-Lead ECG, SAECG, and EPS Findings in Patients With or Without the G Allele of rs1805124 (H558R+ Group or H558R- Group)

	H558R- Group (N = 91)	H558R+ Group (N = 9)	P value
ECG
Spontaneous type1 Brugada ECG in V1 lead	74.7%	33.3%	0.01
Spontaneous type1 Brugada ECG in V2 lead	40.2%	33.3%	0.68
ST in V1 (mV)	2.8 ± 1.4	1.7 ± 0.5	0.0003
ST in V2 (mV)	4.2 ± 1.8	2.4 ± 1.3	0.0038
J points in V1 (mV)	3.3 ± 2.2	2.3 ± 0.5	0.19
J points in V2 (mV)	4.8 ± 2.4	3.5 ± 1.6	0.12
PQ (ms)	170 ± 33	174 ± 23	0.76
QRS (ms)	120 ± 44	106 ± 16	0.61
QT (ms)	397 ± 33	407 ± 24	0.36
QTc (ms)	413 ± 34	425 ± 23	0.32
SAECG
Filtered QRS duration (ms)	163 ± 29	155 ± 26	0.48
RMS 40 (μV)	13 ± 10	11 ± 6	0.67
LAS 40 (ms)	50 ± 15	53 ± 14	0.62
Positive late potentials (%)	76.3%	66.6%	0.53
EPS
AH (ms)	100 ± 20	90 ± 18	0.23
HV (ms)	49 ± 12	48 ± 11	0.77
AVN refractory period (ms)	385 ± 114	306 ± 151	0.12
Sinus node recovery time (ms)	1319 ± 450	1273 ± 87	0.80

ECG electrocardiogram, SAECG signal-averaged ECG, EPS electrophysiological study, RMS 40 root mean square voltage (40 ms), LAS 40 low-amplitude signal