Table 3.
Scoring Systems for Predicting the Success and Efficiency of CTO PCI
| Score Variables | J‐CTO Score36 | CL Score34 | PROGRESS‐CTO Score38 | ORA Score37 | RECHARGE Score39 | Ellis Score35 |
|---|---|---|---|---|---|---|
| No. of cases | 494 | 1657 | 781 | 1073 | 1253 | 456 |
| End point | Guidewire crossing <30 min | Technical success | Technical success | Technical success | Technical success | Technical success |
| Age, y | − | − | − | + (≥75) | + (>65) | − |
| Prior CABG | − | + | − | − | + | − |
| Prior failure | + | − | − | − | − | − |
| Proximal cap | + (Blunt) | + (Blunt) | + (Ambiguous) | + (Ostial) | + | + (Ambiguous, ostial) |
| Tortuosity | + (>45° in lesion) | − | + (Moderatea proximal) | − | + | + |
| Calcification | + | + (Severe) | − | − | + | + |
| Lesion length | + (≥20 mm) | + (≥20 mm) | − | − | + | + |
| Target vessel | − | + (Non‐LAD) | + (LCX) | − | − | + (Poor distal target) |
| Collateral quality | − | − | + (Interventional) | + (Rentrop <2) | − | +b |
| Other | − | Prior myocardial infarction | − | − | BMI >30 kg/m2, nonproximal location | Operator experience |
+ Indicates present; −, absent; BMI, body mass index; CABG, coronary artery bypass grafting; CL, ; CTO, chronic total occlusion; J‐CTO, Japan Chronic Total Occlusion score; LAD, left anterior descending artery; LCX, circumflex artery; ORA, ostial location, Rentrop grade <2, age ≥75 years; PCI, percutaneous coronary intervention; PROGRESS‐CTO, Prospective Global Registry for the Study of Chronic Total Occlusion Intervention; and RECHARGE, Registry of Crossboss and Hybrid Procedures in France, the Netherlands, Belgium and United Kingdom.
Moderate tortuosity was defined as 2 bends >70° or 1 bend >90° proximal to the lesion.
Applying specific collateral classification scoring (range, 0–2) combining Werner collateral classification,40 tortuosity, and collateral type (septal, epicardial, or other).