Table 2.

The Voltages of QRS Complex of the 12 Leads

Leads	All (n = 276)	CA (n = 189)	Control (n = 87)	P value
I (mV)	0.46 ± 0.30	0.40 ± 0.27	0.58 ± 0.34	<0.001
II (mV)	0.55 ± 0.31	0.48 ± 0.30	0.69 ± 0.28	<0.001
III (mV)	0.46 ± 0.31	0.48 ± 0.34	0.44 ± 0.23	0.918
aVR (mV)	0.44 ± 0.26	0.37 ± 0.24	0.59 ± 0.25	<0.001
aVF (mV)	0.47 ± 0.36	0.45 ± 0.39	0.50 ± 0.27	0.016
aVL (mV)	0.39 ± 0.25	0.38 ± 0.26	0.40 ± 0.22	0.120
V1 (mV)	0.85 ± 0.52	0.81 ± 0.53	0.95 ± 0.49	0.009
V2 (mV)	1.67 ± 1.96	1.68 ± 2.32	1.65 ± 0.73	0.150
V3 (mV)	1.60 ± 0.84	1.58 ± 0.89	1.65 ± 0.73	0.290
V4 (mV)	1.50 ± 0.76	1.42 ± 0.76	1.68 ± 0.72	0.003
V5 (mV)	1.23 ± 0.75	1.14 ± 0.75	1.44 ± 0.70	<0.001
V6 (mV)	0.91 ± 0.58	0.80 ± 0.54	1.13 ± 0.61	<0.001