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Table 3 ECG characteristics comparison between VAs arising from MPSA and from PSCs

From: Radiofrequency catheter ablation of ventricular arrhythmias arising from the region above pulmonary valve

Origin MPSA (n = 31) PSCs (n = 75) P
RII (mV) 2.32 ± 0.52 1.81 ± 0.58 < 0.05
RIII (mV) 2.36 ± 0.65 1.69 ± 0.55 < 0.05
RaVF (mV) 2.34 ± 0.58 1.74 ± 0.56 < 0.05
RII+ RIII+ RaVF (mV) 6.76 ± 1.38 4.62 ± 1.04 < 0.05
V1 R/S 0.21 ± 0.07 0.28 ± 0.05 > 0.05
V2 R/S 0.31 ± 0.12 0.35 ± 0.07 > 0.05
Precordial transition zone
 < V3 7 (22.58%) 15 (20.00%) > 0.05
 = V3 15 (48.39%) 36 (48.00%) > 0.05
 > V3 9 (29.03%) 24 (32.00%) > 0.05
Precordial transition index
 > 0 12 (38.71%) 26 (34.67%) > 0.05
 = 0 16 (51.61%) 40 (53.33%) > 0.05
 < 0 3 (9.67%) 9 (12.00%) > 0.05