Modification Procedures for Chronic Total Occlusion Percutaneous Coronary Intervention: Insights From the PROGRESS‐CTO Registry

CTO modification procedures were performed in approximately one of five CTO PCIs during the initial failed procedure. During reattempt CTO PCI, despite higher lesion complexity, CTO modification was associated with similar technical and procedural success and MACE compared to patients undergoing reattempt CTO PCI without prior CTO modification. Among modification techniques, STAR was associated with higher technical and procedural success than SPM.