Table 3.

Comparison of ECG parameters in patients with initially successful and failed RFCA (N = 154).

	Initially success N = 136	Failure N = 18	P value
Interpolated VPCs (%)	23 (16.9%)	1 (5.6%)	0.310
Retrograde P-wave (%)	35 (25.7%)	4 (22.2%)	1
QRS ugly sign (%)	11 (8.1%)	2 (11.1%)	0.651
Pseudo delta wave (%)	22 (16.2%)	8 (44.4%)	0.009∗∗
QTc interval (ms)	430.38 ± 26.56	435.50 ± 28.25	0.978
QRS duration in lead II (ms)	151.51 ± 14.62	154.50 ± 22.83	0.068
R wave amplitude in lead II (mV)	1.88 ± 0.48	2.03 ± 0.40	0.290
QRS duration in lead III (ms)	148.33 ± 14.47	152.39 ± 18.51	0.219
R wave amplitude in lead III (mV)	1.80 ± 0.57	2.15 ± 0.74	0.209
QRS duration in lead aVF (ms)	149.12 ± 14.54	152.33 ± 35.42	0.081
R wave amplitude in lead aVF (mV)	1.82 ± 0.52	1.97 ± 0.53	0.339
Q wave amplitude in lead aVR (mV)	0.92 ± 0.22	1.00 ± 0.22	0.280
Q wave amplitude in lead aVL (mV)	0.81 ± 0.37	0.96 ± 0.41	0.333
R-wave ratio of leads III/II	0.98 ± 0.20	1.00 ± 0.24	0.715
Q-wave ratio of leads aVL/aVR	0.91 ± 0.43	0.91 ± 0.51	0.980
MDI of inferior lead	0.57 ± 0.08	0.58 ± 0.09	0.512
R wave amplitude in V1 (mV)	0.23 ± 0.24	0.35 ± 0.44	0.036∗
IDT in lead V2 (ms)	44.00 ± 18.33	57.41 ± 20.67	0.005∗∗
RS duration in V2 (ms)	93.67 ± 21.33	106.93 ± 18.76	0.004∗∗
QRS duration in V2 (ms)	147.82 ± 17.95	153.11 ± 16.61	0.205
R wave amplitude in V2 (mV)	0.42 ± 0.49	0.71 ± 0.58	0.056
S wave amplitude in V2 (mV)	1.94 ± 0.91	1.61 ± 1.04	0.145
R/S ratio in lead V2	0.21 ± 0.32	0.37 ± 0.90	0.032∗

∗P < 0.05, ∗∗P < 0.01.