Active Retrograde Extra Backup with a Mother-and-Child Catheter to Facilitate Retrograde Microcatheter Collateral Channel Tracking in Recanalization of Coronary Chronic Total Occlusion
Table 2
Angiographic characteristics of the study population.
Variables
ARB group (n = 129)
Non-ARB group (n = 142)
value
Access site
Radial only
13 (10.1%)
18 (12.7%)
0.569
Femoral + radial
90 (69.8%)
96 (67.6%)
0.793
Femoral only
26 (20.2%)
30 (21.1%)
0.881
CTO vessel
LAD-CTO, n (%)
37 (28.7%)
38 (26.8%)
0.786
LCX-CTO, n (%)
10 (7.8%)
14 (9.9%)
0.671
RCA-CTO, n (%)
82 (63.6%)
92 (64.8%)
0.899
Lesion characteristics
In-stent CTO, n (%)
13 (9.4%)
16 (11.3%)
0.696
Blunt stump at proximal cap
58 (45.0%)
65 (45.3%)
0.903
Calcification
52 (40.3%)
55 (38.7%)
0.805
CC tortuosity, n (%)
48 (37.2%)
52 (36.6%)
1
Occlusion length >20 mm
102 (79.1%)
103 (72.5%)
0.257
Side branch at landing zone
58 (45.0%)
60 (42.3%)
0.713
J-CTO score
3.0 ± 1.1
3.1 ± 1.2
0.428
Werner score 0
9 (7.0%)
10 (7.0%)
1
Werner score 1
57 (44.2%)
70 (49.3%)
0.465
Werner score 2
63 (48.8%)
62 (43.7%)
0.464
CTO, chronic total occlusion; LAD, left anterior descending artery; LCX, left circumflex artery; RCA, right coronary artery; CC, collateral channel.
