The use of invasive, pressure wire-based fractional flow reserve (FFR) in the cath lab is now considered the gold standard for assessing the hemodynamic significance of coronary lesions to determine if they should be revascularized or treated medically. Despite being a part of the guidelines and clinician evidence clearly showing the benefit to using FFR, it is still not used in many patients.This is partly due to increased procedure costs from the wires, added procedural time and the use of adenosine as a stressor agent, which can be uncomfortable for patients.
