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Table 4 The ECG characteristics of VAs arising from each PSC and its corresponding MSPA

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

  Anterior PSC and corresponding MSPA (PAC-AMSPA, 38cases) Left PSC and corresponding MSPA
(PLC-LMSPA, 50 cases)
Right PSC and corresponding MSPA
(PRC-RMSPA, 18 cases)
Lead I QS、qs、rs、qr. or r pattern rs or r pattern R pattern
Lead II, III and aVF R pattern, ascending limb notch or peak notch may be seen R pattern, ascending limb notch or peak notch may be seen R pattern, descending limb notch may be seen
Lead aVR and a VL QS, QSaVL>QSaVR QS, QSaVR>QSaVL main QS, a minority of qs or qR, QSaVR>QSaVl
Lead V1-V2 rS or RS rS or RS rS or RS
Lead V3 rS, RS or Rs rS, RS or Rs rS
Lead V4 R or Rs R or Rs Rs or R
Lead V5-V6 R pattern, ascending limb notch or peak notch may be seen R pattern, ascending limb notch or peak notch may be seen R pattern, descending limb notch may be seen
R I (mV) −0.12 ± 0.11#^ 0.36 ± 0.13 0.41 ± 0.18
RII (mV) 1.92 ± 0.48 1.83 ± 0.38 1.45 ± 0.41*#
RIII (mV) 2.04 ± 0.49#^ 1.52 ± 0.42*^ 1.11 ± 0.39*#
RaVF (mV) 1.96 ± 0.47#^ 1.67 ± 0.39*^ 1.27 ± 0.41*#
RII + III + aVF (mV) 6.02 ± 1.45#^ 5.13 ± 1.32*^ 3.94 ± 1.01*#
QSaVR (mV) −0.96 ± 0.22 −1.05 ± 0.36 − 0.92 ± 0.39
QSaVL (mV) −1.07 ± 0.26#^ −0.61 ± 0.32*^ − 0.33 ± 0.28*#
QSaVR/aVL 0.89 ± 0.23#^ 1.72 ± 1.32*^ 2.79 ± 2.57*#
RV1(mV) 0.28 ± 0.13 0.32 ± 0.12 0.36 ± 0.22
RV2(mV) 0.35 ± 0.17 0.55 ± 0.22*^ 0.42 ± 0.24
RV3(mV) 0.63 ± 0.31 0.89 ± 0.37*^ 0.66 ± 0.33
RV4(mV) 1.28 ± 0.52 1.39 ± 0.51 0.99 ± 0.41*#
RV5(mV) 1.79 ± 0.53 1.68 ± 0.51 1.38 ± 0.54*#
RV6(mV) 1.72 ± 0.43 1.67 ± 0.53 1.36 ± 0.49*#
RV4 + V5 + V6(mV) 4.79 ± 1.32 4.74 ± 1.68 3.73 ± 0.82*#
  1. *Compared with PAC-AMSPA, p < 0.05
  2. #Compared with PLC-LMSPA, p < 0.05
  3. ^Compared with PRC-RMSPA, p < 0.05