Total (n=185) Evolution (n=43 = Group A) Evolution RL (n=142 = Group B) P value
Age at implantation Mean ± SD
57.84 ± 13.00
59.70 ± 15.76
57.28 ± 12.05
0.2248
Age at extraction mean ± SD
66.30 ± 13.30
66.67 ± 16.36
66.18 ± 12.29
0.6367
Male gender 135/185 (73.0%) 32/43 (74.4%) 103/39 (72.5%) 0.8075
L.E. Indication <0.001
Infection 67/185 (36.2%) 30/43 (69.8%) 37/142 (26.1%)
Lead malfunction 83/185 (44.9%) 12/43 (27.9%) 71/142 (50.0%)
Other 35/185 (18.9%) 1/43 (2.3%) 34/142 (23.9%)
Systolic LV function 0.5020
severe impairment 77/185 (41.6%) 16/43 (37.2%) 61/142 (43.0%)
moderate impairment 29/185 (15.7%) 6/43 (14.0%) 23/142 (16.2%)
mild impairment 31/185 (16.8%) 6/43 (14.0%) 25/142 (17.6%)
normal 48/185 (26.0%) 15/43 (34.9%) 33/142 (23.2%)
Leads extraction
RV Pace-sense lead 66 (35.7%) 18/43 (41.9%) 48/142 (23.8%) 0.3339
RV shock lead (ICD) 123 (66.5%) 25/43 (58.1%) 98/142 (69.0%) 0.1857
Lead age (years) 0.0003
0 – 2 13/185 (7.0%) 9/43 (20.9%) 4/142 (2.8%)
2 – 4 24/185 (13.0%) 6/43 (14.0%) 18/142 (12.7%)
4 – 6 34/185 (18.4%) 11/43 (25.6%) 23/142 (16.2%)
6 – 8 36/185 (19.5%) 7/43 (16.3%) 29/142 (20.4%)
8 – 10 30/185 (16.2%) 2/43 (4.7%) 28/142 (19.7%)
Age lead > 10 years 48/185 (26.0%) 8/43 (18.6%) 40/142 (28.2%) 0.2100