Overall (n=160) Group 1 (n=18) Group 2 (n=53) Group 3 (n=89)
P value
Number of procedures (n, %) - 1 - 2 - 3 - 4 129 (80) 25 (16) 3 (2) 3 (2) 17 (94) 1 (6) - - 46 (87) 6 (11) - 1 (2) 66 (74) 18 (20) 3 (4) 2 (2)
0.327
Procedure time (mean ± SD) 196±56 137±39 188±52 212±53 <0.0001
Fluoroscopy time (mean ± SD) 6.7±6.3 6.4±7.8 6.5±5.5 6.8±6.6 0.959
Radiation dose (cGy*cm2) (mean ± SD) 219±337 237±518 208±305 221±320 0.962
LV access (n, %) - transseptal only - retroaortic only - transseptal + retroaortic 121 (76) 22 (14) 5 (3) 12 (67) 2 (11) 1 (6) 37 (70) 11 (21) - 72 (81) 9 (10) 4 (5)
0.148
RV mapping (n, %) 49 (31) 2 (11) 22 (42) 25 (28) 0.040
Multielectrode mapping catheter (n, %) 107 (67) 9 (50) 33 (62) 65 (73) 0.114
Clinical VT cycle length (mean ± SD) 372±92 318±52 381±103 369±87 0.393
Epicardial access (n, %) 46 (29) 3 (17) 14 (26) 29 (33) 0.402
Endocardial scar (%)(mean ± SD) 15.8±13.1 8.2±5 12.3±11.8 18.8±13.7 0.008
Epicardial scar (%)(mean ± SD) 17.7±25.3 - 24.3±29.4 15.1±23.6 0.335
Radiofrequency time (min)(mean ± SD) 21.9±13.2 13.8±6.4 19.1±10.1 23.7±14.5 0.215
PVS at the end of procedure (n, %) 129 (81) 7 (39) 44 (83) 78 (88) <0.0001
Major complications - Vascular - Tamponade - Stroke - Acute hemodynamic decompensation - Coronary oclussion 4 (2.5) 4 (2.5) - 9 (5.6) 1 (0.6) 1 (5.6) 1 (5.6) - - - 2 (3.8) 3 (5.7) - 4 (7.5) - 1 (1.1) - - 5 (5.6) 1 (1.1)
0.329