This document discusses the use of predictive scores in percutaneous coronary intervention (PCI) for chronic total occlusions (CTO). It notes that CTO PCI procedures are more complex and costly than non-CTO PCI, with potentially lower success rates and higher complication risks. Several predictive scores for CTO PCI are presented, including the J-CTO score, CL-RECTOR score, PROGRESS CTO score, and ORA score, which aim to estimate the likelihood of guidewire crossing or procedural success. The document emphasizes that predictive scores can help select appropriate CTO PCI candidates, determine the best strategy, and aid in procedural planning. Accurately assessing a lesion's complexity pre-procedure could impact duration, need for