Table 2.
Angiographic and procedural characteristics of the cohort.
| Study population (n = 526) | |
|---|---|
| CTO site | |
| RCA | 242 (46%) |
| LAD | 174 (33.1%) |
| LCX | 96 (18.3%) |
| DG | 7 (1.3%) |
| RI | 3 (0.6%) |
| LM | 2 (0.4%) |
| SVG | 2 (0.4%) |
| Blunt stump | 172 (32.7%) |
| Calcification | 225 (42.8%) |
| Tortuosity | 122 (23.2%) |
| Occlusion length ≥ 20 mm | 125 (23.8%) |
| Previously failed attempt | 47 (8.9%) |
| Ostial location | 45 (8.6%) |
| J-CTO score | |
| Easy | 142 (27%) |
| Intemediate | 184 (35%) |
| Difficult | 114 (21.7%) |
| Very difficult | 85 (16.2%) |
| Retrograde approach | 76 (14.4%) |
| ADR | 8 (1.52%) |
ADR — antegrade dissection reentry; CTO — chronic total occlusion; DG — diagonal; LAD — left anterior descending coronary artery; LCX — left cirumflex artery; LM — left main; RCA — right coronary artery; RI — ramus intermedius; SVG — saphenous vein graft