Table 2

Distribution of Latest Site of Activation, LV Lead Position, Implant-Related Complications, and Procedural Characteristics Between Both Treated Groups

Target Group (n = 103)Control Group (n = 104)p Value
Latest site of activation, % (% basal/mid)0.962
 Inferior13 (13) [4/9]14 (15) [5/9]
 Posterior38 (39) [14/24]41 (43) [15/26]
 Lateral32 (33) [13/19]31 (32) [11/20]
 Anterior9 (9) [3/6]7 (7) [3/4]
 Anteroseptal4 (4) [1/3]4 (4) [1/3]
 Inferoseptal4 (4) [1/3]3 (3) [0/3]
LV lead position, % (% basal/mid/apical)0.442
 Inferior12 (12) [4/7/1]6 (6) [1/4/1]
 Posterior35 (36) [12/20/3]38 (40) [14/22/2]
 Lateral46 (47) [16/29/1]47 (49) [13/31/3]
 Anterior3 (3) [1/2]6 (6) [2/4]
Failed implantation4 (4)3 (3)
Relationship of LV lead to late site0.011
 Concordant61 (63)45 (47)
 Adjacent25 (26)28 (29)
 Remote10 (10)24 (25)
 Failed implantation4 (4)3 (3)
Scar at LV lead site8 (8)16 (15)0.131
Implant-related complications0.993
 Total13 (13)14 (13)
 Failure to implant LV lead4 (4)3 (3)
 LV lead displacement requiring repositioning5 (5)6 (6)
 Device infection requiring extraction and reimplantation1 (1)1 (1)
 Pneumothorax requiring chest drain1 (1)1 (1)
 Myocardial perforation1 (1)1 (1)
 Phrenic nerve stimulation (LV lead reposition)1 (1)2 (2)
Procedural characteristics
 Procedural length, min139 ± 36138 ± 420.823
 Screening time, min25 ± 1419 ± 130.033
 Screening dose, mGy/cm2133 ± 10791 ± 690.024

Values are absolute numbers (%) or mean ± SD.

LV = left ventricular.