Table 2.
Angiographic characteristics
| Angiographic characteristics | Overall (n = 64) | Success (n = 41) | Failure (n = 23) | P value |
| CTO Site | 0.0045 | |||
| LAD | 27 (42.2%) | 21 (51.5%) | 6 (26.1%) | |
| RCA | 31 (48.4%) | 16 (39.0%) | 15 (65.2%) | |
| LCx | 6 (9.4%) | 4 (9.7%) | 2 (8.7%) | |
| Blunt stump | 19 (29.7%) | 10 (24.3%) | 9 (39.1%) | 0.34 |
| Tortuous vessel | 23 (35.9%) | 12 (29.2%) | 11 (47.8%) | 0.225 |
| Calcified lesion | 11 (17.2%) | 4 (9.7%) | 7 (30.4%) | 0.047 |
| Lesion length > 20 mm | 49 (93.8%) | 30 (73.1%) | 19 (82.6%) | 0.58 |
| J-CTO Score | 2.9 ± 0.92 | 2.73 ± 0.84 | 3.2 ± 0.99 | 0.0063 |
| J-CTO 1 | 4 (6.25%) | 3 (7.3%) | 1 (21.4%) | 1 |
| J-CTO 2 | 18 (28.1%) | 12 (29.3%) | 6 (26.1%) | 1 |
| J-CTO 3 | 22 (34.4%) | 19 (46.3%) | 3 (39.1%) | 0.015 |
| J-CTO 4 | 20 (31.2%) | 7 (17.1%) | 13 (56.5%) | 0.0028 |
| Rentrop class 3 | 43 (67.2%) | 26 (48.8%) | 17 (73.9%) | 0.56 |
| Segment | ||||
| Distal | 4 (6.2%) | 2 (4.9%) | 2 (8.7%) | 0.61 |
| Mid | 27 (42.2%) | 16 (39.0%) | 11 (47.8%) | 0.67 |
| Proximal | 33 (51.6%) | 23 (56.1%) | 10 (43.5%) | 0.47 |
| Segment length | 26.95 ± 12.2 | 25.4 ± 10.3 | 29.7 ± 14.9 | 0.23 |
| Presence of proximal disease | 15 (23.4%) | 9 (21.9%) | 6 (26.1%) | 0.95 |
LAD: Left anterior descending; LCx: Left circumflex; RCA: Right coronary artery; CTO: Chronic total occlusions; J-CTO: Japanese chronic total occlusion.