Background The instantaneous wave-free ratio (iFR) is an index used to assess the severity
of coronary-artery stenosis. The index has been tested against fractional flow reserve (FFR) …

Background Instantaneous wave-free ratio (iFR) is a coronary physiology index used to
assess the severity of coronary artery stenosis to guide revascularization. iFR has previously …

Background Coronary revascularization guided by fractional flow reserve (FFR) is
associated with better patient outcomes after the procedure than revascularization guided by …

Objectives: This study sought to compare fractional flow reserve (FFR) with the
instantaneous wave-free ratio (iFR) in patients with coronary artery disease and also to …

Aims: To evaluate the classification agreement between instantaneous wave-free ratio (iFR)
and fractional flow reserve (FFR) in patients with angiographic intermediate coronary …

Objectives: The aim of this study was to investigate the clinical outcomes of patients deferred
from coronary revascularization on the basis of instantaneous wave-free ratio (iFR) or …

Objectives To identify clinical, angiographic and hemodynamic predictors of discordance
between instantaneous wave‐free ratio (iFR) and fractional flow reserve (FFR). Background …

Background Adoption of fractional flow reserve (FFR) remains low (6-8%), partly because of
the time, cost and potential inconvenience associated with vasodilator administration. The …

In this review, the authors reflect upon the role of coronary physiology in the modern
management of coronary artery disease. They critically appraise the scientific background of …

Background: Fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR) disagree
on the hemodynamic significance of a coronary lesion in≈ 20% of cases. It is unknown …