Figure 2: Example of Functional Assessment Before and After Revascularisation.

(A) The functional significance of a stenosis of the left anterior descending (LAD) coronary artery was calculated by noninvasive fractional flow reserve (FFR) from coronary computed tomographic angiography data (FFRCT=0.72) and by FFR measurement during invasive coronary angiography (FFR=0.68). (B) Fractional flow reserve derived from computed tomography angiography FFRCT demonstrated no ischemia in the LAD after virtual stenting, with a computed value of 0.86. Invasive FFR after stent implantation was 0.90. Reproduced with permission.[29]