Background/purpose Fractional flow reserve (FFR) remains underutilized due to practical
concerns related to the need for hyperemic agents. These concerns have prompted the …

Purpose Quantitative flow ratio (QFR) is a recently developed image-based index for the
assessment of borderline coronary artery disease. We sought to investigate a correlation …

Introduction: The assessment of coronary lesions severity has always been a relevant topic
in the management of the patient undergoing coronary angiography. Fractional flow reserve …

Background Coronary revascularization is commonly based on the angiographic finding of
percent diameter stenosis (% DS)> 50 while lesion length (LL), which contributes to flow …

Background This study aimed to simultaneously investigate diagnostic performance and
limitation of quantitative flow reserve (QFR) for assessing functionally significant coronary …

Background—Coronary flow reserve has extensive validation as a prognostic marker in
coronary disease. Although pressure-only fractional flow reserve (FFR) improves outcomes …

Background: Instantaneous wave-free ratio (iFR) has been used in clinical practice to
identify functionally significant stenosis and to guide treatment strategy. However, there are …

Background. Fractional flow reserve (FFR), as a functional measurement of coronary
stenosis, is recommended for guiding revascularization in intermediate coronary lesions …

Background The instantaneous wave-free ratio (iFR) is a new adenosine-independent index
of coronary stenosis severity. Most published data have been based on off-line analyses of …

Assessment of the functional significance of coronary artery stenosis using invasive
measurement of fractional flow reserve (FFR) or non-hyperemic indices has been shown to …