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Table 2 Electrophysiology study and Radiofrequency catheter ablation of VAs arising from MSPA and PSCs

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

  Total (n = 106) MSPA (n = 31) PSCs (n = 75) P valve
Pulmonary artery potential 18 (17.0%) 4 (12.9%) 14 (18.7%) > 0.05
QS morphology in unipolar electrogram 106 (100%) 31 (100%) 75 (100%) > 0.05
 With notch in descending limb 41 (38.7%) 11 (35.5%) 30 (40%) > 0.05
Farfield atrial potential of target site in bipolar electrogram 63 (59.4%) 18 (58.1%) 45 (60.0%) > 0.05
Merged or discrete potential of peak or split morphology of target site in bipolar electrogram 69 (65.1%) 20 (64.5%) 49 (65.3%) > 0.05
 Reversed polarity of bipolar electrograms 53 (50.0%) 15 (48.4%) 38 (50.7%) > 0.05
Application of temperature-controlled catheter 34 (32.1%) 26 (83.87) 9 (13.0) < 0.001
Application of irrigated-tip catheter 71 (67.0%) 5 (16.13) 66 (87.00) < 0.05
V-QRS (ms) −34.71 ± 4.26 −35.62 ± 6.79 −34.78 ± 3.75 > 0.05
Pace match of target site (lead) 11.16 ± 0.90 11.34 ± 0.52 11.08 ± 0.90 < 0.05
Pacing target site induced good pace match 95 (89.6%) 25 (80.7%) 70 (93.3%) > 0.05
 12-lead match 40 (37.7%) 10 (32.3%) 30 (40.0%) > 0.05
 11-lead match 33 (31.1%) 9 (29.0%) 24 (32.0%) > 0.05
 10-lead match 22 (20.8%) 6 (19.4%) 16 (21.3%) > 0.05
Application of R0 Swartz sheath 73 (68.9%) 2 (6.45%) 71 (94.67) < 0.001
Procedural time (min) 54.28 ± 13.63 65.24 ± 17.26 46.28 ± 9.30 < 0.001
Fluoroscopic time (min) 8.07 ± 2.93 9.31 ± 3.16 7.19 ± 2.77 < 0.05
Lesions of energy application 2.76 ± 1.89 3.89 ± 2.59 2.20 ± 0.79 < 0.001
Energy delivery duration (s) 243.86 ± 88.40 335.32 ± 72.11 210.76 ± 65.80 < 0.001
Success of ablation 106 (100%) 31 (100.00) 75 (100.00) > 0.05
Response of energy application on target site
 PVC/VT disappeared immediately 95 (89.6%) 27 (87.10) 68 (90.67) > 0.05
 PVC accelerated or decelerated prior to disappearance 11 (10.4%) 4 (12.90) 7 (10.72) > 0.05