Electrocardiogram Parameters That Affect the Success Rate of Radiofrequency Ablation in Patients with Outflow Tract Ventricular Premature Complexes

Table 3

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

	Initially success	Failure	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)			0.978
QRS duration in lead II (ms)			0.068
R wave amplitude in lead II (mV)			0.290
QRS duration in lead III (ms)			0.219
R wave amplitude in lead III (mV)			0.209
QRS duration in lead aVF (ms)			0.081
R wave amplitude in lead aVF (mV)			0.339
Q wave amplitude in lead aVR (mV)			0.280
Q wave amplitude in lead aVL (mV)			0.333
R-wave ratio of leads III/II			0.715
Q-wave ratio of leads aVL/aVR			0.980
MDI of inferior lead			0.512
R wave amplitude in V1 (mV)			0.036
IDT in lead V2 (ms)			0.005
RS duration in V2 (ms)			0.004
QRS duration in V2 (ms)			0.205
R wave amplitude in V2 (mV)			0.056
S wave amplitude in V2 (mV)			0.145
R/S ratio in lead V2			0.032

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