The purpose of this study is to establish a consensus of treatment strategy of percutaneous coronary intervention (PCI) for chronic total occlusion (CTO) through patient registry of PCI for CTO performed by Japanese certified operators.

Inclusion Criteria:

Patients eligible for PCI

Patients who underwent PCI for CTO lesions that contain the following:

1. Thrombolysis in myocardial infarction trial (TIMI) 0
2. The occlusive period more than 3 months or unknown
3. The main coronary arteries (segment 1-3, 5-8, 11, 13), branches that have large perfusion area (segment 4PL, 9/10, 12) and graft

Exclusion Criteria:

Patients ineligible for PCI judged in clinical practice

Patients who underwent PCI for CTO lesions by Japanese certified operators