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Despite the clinical importance of ischemia evaluation, obtaining fractional flow reserve (FFR) value has, heretofore, only been available during invasive cardiac catheterization. Although there is a clear linkage between morphology and physiology, a significant gap still exists. FFR derived from coronary computed tomography angiography (FFR CT ) is a novel method of quantifying the hemodynamic significance of coronary artery stenoses by translating morphological information into hemodynamic data. Improved diagnostic performance of FFR CT has been repeatedly demonstrated in comparison with coronary computed tomography angiography alone with an invasive FFR reference standard. More recently, the potential benefit of this technology to safely defer non-indicated catheterizations and reduce healthcare costs has been established and indicates this technology may improve the management of patients with coronary artery disease. In this review, we summarize the scientific basis of FFR CT and evidence from clinical trials, provide illustrative examples of clinical applications, discuss potential limitations, and outline avenues for future research.

circulation journal

Noninvasive Fractional Flow Reserve Derived From Coronary Computed Tomography Angiography ― Is This Just Another New Diagnostic Test or the Long-Awaited Game Changer? ―