Figure 13
Mean fractional flow reserve in dependence on degree of deformation (left) and segment length (right). The mean pressure derived fractional flow reserve of the baseline environment shown in Figure 8 is plotted as a function of deformation (left) defined in equation (3) and versus the segment length (right). The computations via the boundary layer theory (BLT) are compared to Hagen-Poiseuille (HP) flow profile (γ = 2). It is seen that the mean pressure derived fractional flow reserve is overestimated under the assumption of fully developed flow. Generally the mean FFR is larger in the dynamic case (dashed lines), because the pressure recovers during the relaxation phase. The segment length of three dynamic lesions at a deformation of ζ 0 = 0.7, 0.5 and 0.3 was varied in a physiological range between 5 mm and 40 mm.