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Diagnosing Gray Zone Coronary Physiology
Moderator: William F. Fearon, MDPanel: Morton J. Kern, MD, MSCAI, FAHA, FACC; Nils P. Johnson, MD, MS; and John McBarron Hodgson, MD, MSCAI
Challenging Cases: What Would You Do?
By Ted E. Feldman, MD, MSCAI, FACC, FESC, and Shakeel A. Qureshi, MD, FRCP, FRCPCH
Findings Reported From DEFINE-FLOW Study of Deferral of PCI in FFR-Abnormal Lesions With Preserved Coronary Flow Reserve
October 16, 2020—A new observational study of deferred lesions following combined fractional flow reserve (FFR) and coronary flow reserve (CFR) assessments found that untreated vessels with abnormal FFR but intact CFR do not have noninferior outcomes compared to those with an FFR > 0.8 and a CFR ≥ 2.0 when treated medically.
