Long‐term serial functional evaluation after implantation of the Fantom sirolimus‐eluting bioresorbable coronary scaffold

BACKGROUND: Quantitative flow ratio (QFR) has been validated as an accurate surrogate of standard wire-based fractional flow reserve. The clinical and angiographic outcomes of the Fantom sirolimus-eluting bioresorbable coronary scaffold (BRS) have been previously studied and reported. We investigate the functional performance of the Fantom BRS. METHODS: The FANTOM II trial prospectively enrolled 240 patients with stable coronary artery disease or unstable angina, of which 235 patients received the Fantom BRS and were included in the present analysis. We performed an independent serial QFR analysis of the target vessel at baseline, post-percutaneous coronary intervention (PCI), and at 6- or 9-month and 24-month follow-up, using a QFR threshold