Table 1.
Chronic total occlusion prevalence, location and treatment applied in different studies n (%)
| Ref. | Type of study | Population | CTO prevalence |
CTO location |
Medical treatment | PCI | CABG | ||
| RCA | LAD | LCA | |||||||
| Kahn et al[2], 1993 | Retrospective | 333 Coronary disease (stenoses ≥ 50%) | 101 (35) | 58% | 18% | 24% | - | - | - |
| Christofferson et al[3], 2005 | Retrospective | 6581 Underwent coronarography because of suspected CD | 1612 (25) | 49.4% | 22% | 28.60% | 49% | 11% | 40% |
| 3087 Coronary disease (stenoses ≥ 70%) | 1612 (52) | ||||||||
| Srinivas et al[4], 2002 | Retrospective | 1761 Multivessel disease | 545 (31) | - | - | - | - | 14.50% | - |
| Yamamoto et al[5], 2013 | Prospective | 15263 First revascularization procedure | 2491 (19) | 44.9% | 41.10% | 28.50% | - | 61.18% | - |
| Fefer et al[6], 2012 | Prospective | 14439 Underwent coronariography because of suspected CD | 2630 (18.2) | 46.9% | 19.86% | 15.43% | 64% | 10% | 26% |
| Jeroudi et al[7], 2013 | Prospective | 1015 Coronary disease (stenoses ≥ 50%) | 319 (31.34) | - | - | - | 19% (61) | 50% (161) | 30% (97) |
CTO: Chronic total occlusion; RCA: Right coronary artery; LAD: Left anterior descending; LCA: Left circumflex artery; PCI: Percutaneous coronary intervention; CABG: Coronary artery bypass graft.