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Table 1 Differences in baseline patient characteristics and VAs electrocardiographic morphologies

From: Unique electrocardiographic pattern “w” wave in lead I of idiopathic ventricular arrhythmias arising from the distal great cardiac vein

Characteristic GCV group (n = 15) LCC group (n = 15) Subvalvular region group (n = 9) P value* P value#
Male, n (%) 14(93%) 13(87%) 8(89%)   
Age (years) 51 ± 23 48 ± 21 50 ± 14 0.71 0.81
VAs burden (%) 23 ± 6 20 ± 6 23 ± 5 0.13 0.85
LVEF (%) 64.8 ± 4.3 63.2 ± 4.8 62.0 ± 5.1 0.34 0.17
Structural heart disease (%) 0 0 0   
Limb leads
 R-wave amplitude in lead II (mV) 1.45 ± 0.46 2.04 ± 0.36 2.28 ± 0.20 < 0.05 < 0.05
 R-wave amplitude in lead III(mV) 1.74 ± 0.53 2.22 ± 0.29 2.72 ± 0.30 < 0.05 < 0.05
 III/II R-wave amplitude ratio 1.21 ± 0.12 1.11 ± 0.09 1.19 ± 0.07 0.06 0.65
 Q-wave amplitude in lead aVR(mV) 0.65 ± 0.22 1.26 ± 0.23 0.97 ± 0.10 < 0.05 < 0.05
 Q-wave amplitude in lead aVL(mV) 1.05 ± 0.31 1.32 ± 0.12 1.58 ± 0.19 < 0.05 < 0.05
 aVL/aVR Q-wave amplitude ratio 1.72 ± 0.39 1.51 ± 0.2 1.67 ± 0.43 0.07 0.77
Duration (ms)
 QRS duration 172 ± 19 148 ± 5 152 ± 6 < 0.05 < 0.05
 IDT 110 ± 16 96 ± 9 93 ± 8 < 0.05 < 0.05
 Delta wave (ms) 52 ± 11 46 ± 7 48 ± 8 0.86 0.16
 MDI 0.64 ± 0.05 0.60 ± 0.04 0.61 ± 0.02 < 0.05 < 0.05
  1. VAs ventricular arrhythmias, GCV great cardiac vein, LCC left coronary cusp, IDT intrinsicoid deflection time, MDI maximum deflection index. *Comparison between GCV and LCC group, #Comparison between GCV and Subvalvular region group