Prevalence and Clinical Outcomes of Discordant Lesions Between Fractional Flow Reserve and Nonhyperemic Pressure Ratios in Clinical Practice: The J-PRIDE Registry

Limited large-scale, real-world data exist on the prevalence and clinical impact of discordance between fractional flow reserve (FFR) and nonhyperemic pressure ratios (NHPRs). The J-PRIDE registry (Clinical Outcomes of Japanese Patients With Coronary Artery Disease Assessed by Resting Indices and Fractional Flow Reserve: A Prospective Multicenter Registry) prospectively enrolled 4304 lesions in 3200 patients from 20 Japanese centers. The lesions were classified into FFR+/NHPR-, FFR-/NHPR+, FFR+/NHPR+, or FFR-/NHPR groups according to cutoff values of 0.89 for NHPRs and 0.80 for FFR. The primary study end point was the cumulative 1-year incidence of target vessel failure (a composite of cardiac death, target vessel-related myocardial infarction, and clinically driven target vessel revascularization) on a lesion basis. An NHPR cutoff value of 0.89, determined using online software, predicted an FFR of 0.80 across various NHPR types. Discordance between FFR and NHPRs was observed in 20% of lesions (FFR+/NHPR-, 11.2%; FFR-/NHPRs+, 8.8%). Revascularization was deferred in 42.9% and 88.4% of the FFR+/NHPR- and FFR-/NHPR+ groups, respectively. In deferred vessels, the FFR+/NHPR- and FFR-/NHPR+ groups showed a higher 1-year incidence of target vessel failure compared with the FFR-/NHPR- group (7.9% versus 5.5% versus 1.7%; for FFR+/NHPR-, adjusted hazard ratio [aHR], 4.89 [95% CI, 2.68-8.91];