Coronary CT angiography derived fractional flow reserve: the game changer in noninvasive testing

A CT angiogram shows whether a coronary artery is narrowed; it doesn’t show whether the narrowing actually starves the heart of blood. FFR-CT — fractional flow reserve computed from the CT images — aims to answer that second question without a catheter, and this review calls it a potential game-changer.

By applying computational fluid dynamics to a standard coronary CT, FFR-CT estimates the physiological significance of each lesion. The authors report high diagnostic performance against invasive measurement and, importantly, real downstream value: fewer patients sent to the catheterization lab only to find a blockage that wasn’t flow-limiting.

The practical takeaway is a more complete non-invasive workup — anatomy plus function from a single scan — that can keep patients out of invasive procedures. The resistance is pointed: cath-lab-based cardiologists and hospitals stand to lose procedural volume.

We rate the evidence moderate: a strong synthesis of emerging data, but a review, and several authors have worked with the commercial FFR-CT vendors — a conflict worth noting. Its clinical significance is high — adding function to CT could genuinely shift stable-CAD management away from unnecessary invasive testing — pending more data on interpretation and cost-effectiveness.