ULTRA-CTO is a prospective multicentre non-randomised investigator-initiated trial designed to enrol 200 subjects with an indication for percutaneous coronary intervention (PCI) of chronic total occluded (CTO) coronary artery. The main objective of the study is to assess the predictive value of post-PCI resting full-cycle ratio (RFR) and fractional flow reserve (FFR) with regard to Fractional flow reserve (SSR) in CTO patients.
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The AUC of post-PCI RFR compared to the AUC of post-PCI FFR with regard to SSR.
Timeframe: Index procedure (or staged procedure if indicated).