Table 2

Angiographic and Treatment Factors of CTO Success and Failure Groups

VariablesCTO Success (n = 791)CTO Failure (n = 113)p Value
Target vessel
 LAD239 (30.2%)28 (24.6%)NS
 RCA312 (39.3%)43 (37.9%)NS
 LCX182 (23.1%)19 (17.2%)NS
 LMT4 (0.4%)1 (0.4%)NS
 Branch52 (6.6%)22 (19.7%)<0.0001
 RITA1 (0.1%)0NS
 SVG1 (0.1%)0NS
Significant side branch at CTO site144 (18.2%)11 (9.8%)0.03
Calcification
 None240 (30.1%)37 (31.5%)NS
 Mild258 (32.3%)32 (28.5%)NS
 Moderate214 (26.9%)22 (19.2%)0.001
 Severe79 (9.9%)22 (19.2%)NS
Ostial location0.294
 Aorto-ostial10 (1.2%)2 (1.4%)
 Nonaorto-ostial86 (10.9%)17 (14.7%)
 Nonostial695 (87.8%)94 (83.7%)
Tortuosity
 None675 (85.1%)85 (75.3%)NS
 Moderate81 (10.5%)16 (14.3%)NS
 Severe35 (4.4%)12 (10.3%)0.001
In-stent restenosis95 (12.1%)9 (8.3%)0.174
Lesion length30.53 ± 13.6824.72 ± 6.010.067

Values are mean ± SD or n (%).

 CTO = chronic total occlusion; LAD = left anterior descending artery; LCX = left circumflex artery; LMT = left main trunk; RCA = right coronary artery; RITA = right internal thoracic artery; SVG = saphenous vein graft.