PCI guided by quantitative flow ratio improves outcomes: study

Percutaneous coronary intervention guided by mathematical modelling that predicts flow rates in the coronary arteries results in 35% fewer major adverse cardiac events than angiography alone, researchers report.
The approach does away with the need for pressure wires which can slow down procedures, they say.
A quantitative flow ratio (QFR, 0-1; 1 means no stenosis) is calculated by a computer program rather than being measured with pressure wires under induced hyperaemia.
Two different angiographic views are used by the program to build a 3D model of the patient’s coronary arteries and then fluid dynamic calculations are performed to determine locations with functional stenosis, defined as the areas with QFR of less than 0.8.