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Percutaneous coronary intervention for chronic total occlusions (CTOs) is still today a challenge even for experienced operators. In the hands of the most experienced the success rate increased from about 60 to 90 % in the past 10 years; paralleled by a long-term patency with drug-eluting stents exceeding 90 %. These results are comparable or even superior to surgical revascularisation. Thanks to Japanese and European CTO club online registries and live courses we are able to rapidly understand and adopt new strategies, techniques and materials to master morphology deemed untreatable 10 years ago. Several of the persistent challenges and solutions unique to CTO interventions are discussed.

Challenges in Complicated Coronary Chronic Total Occlusion Recanalisation