1. In-stent fractional flow reserve variations and related optical coherence tomography findings: the FFR–OCT co-registration study

    In-stent fractional flow reserve variations and related optical coherence tomography findings: the FFR–OCT co-registration study

    We sought to assess in-stent variations in fractional flow reserve (FFR) in patients with previous percutaneous coronary intervention (PCI) and to associate any drop in FFR with findings by optical coherence tomography (OCT) imaging. Suboptimal post-PCI FFR values were previously associated with poor outcomes. It is not known to which extent in-stent pressure loss contributes to reduced FFR. In this single-arm observational study, 26 patients who previously underwent PCI with drug-eluting stent or scaffold implantation were enrolled. Motorized FFR pullback during continuous intravenous adenosine infusion and OCT assessments was performed. Post-PCI FFR < 0.94 was defined as suboptimal. At a ...

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