Computerised Methodologies for Non-Invasive Angiography-Derived Fractional Flow Reserve Assessment: A Critical Review

Figure 1

Functionally significant moderate lesion assessed by vFAI. (a) Coronary angiography image of a left anterior descending artery with an intermediate stenosis. The area with maximal diameter stenosis is marked with a white arrow. The haemodynamic significance of this lesion was assessed with invasive pressure wire showing FFR = 0.64 (haemodynamically significant). (b) The 3D-QCA reconstruction model and colour-coded pressure distribution map at two different flow rates, 1 ml/s and 3 ml/s. (c) Relationship between Pd/Pa ratio and coronary flow in the interrogated segment of the studied artery (reproduced with permission from Papafaklis et al. [15]).

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