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. 2015 Mar 28;2(1):e000228. doi: 10.1136/openhrt-2014-000228

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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions

This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/

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Success rates for procedures undertaken by pre-proctored/non-proctored and post-proctored operators categorised according to JCTO score. JCTO score 0/1 implies easy or moderate and JCTO score ≥2 implies difficult or very difficult. In each bar successful procedures are further categorised by final successful strategy. The proctored group had significantly more overall success compared with the pre-proctored/non-proctored group (77.5% vs 62.1%, respectively, p<0.0001). This was driven mainly by an increase in success rate in patients with JCTO≥2 (70.7% vs 49.5%, p=0.0003). JCTO, Japanese chronic total occlusion; AWE, antegrade wire escalation; ADR, antegrade dissection re-entry; RETRO, retrograde.