Objective The aim of this study is to evaluate the diagnostic and prognostic value of non-
hyperaemic Pd/Pa and to determine its additional value when combined with the gold …

Introduction and objectives Quantitative flow ratio (QFR) is a novel noninvasive method for
evaluating coronary physiology. However, data on the QFR in patients with aortic stenosis …

Guidelines recommend using hyperemic (FFR) and non-hyperemic (iFR/RFR) methods of
evaluating coronary artery stenoses in patients with coronary artery disease. However, in …

Background: The validity of functional assessment of coronary artery disease with fractional
flow reserve (FFR) and/or instantaneous wave-free ratio (iFR) in patients with severe aortic …

Purpose Recent data suggests that fractional flow reserve (FFR) may underestimate
intermediate coronary stenosis in the presence of severe aortic stenosis (AS), whereas …

Results Twelve patients with severe aortic stenosis and borderline lesions in the coronary
artery were qualified for physiological assessment. There were 6 women, whose mean age …

Introducción y objetivos El cociente de flujo cuantitativo (quantitative flow ratio [QFR]) es un
método novedoso y no invasivo para evaluar la fisiología coronaria. Sin embargo, los datos …

Background: Quantitative flow ratio (QFR) is a novel angiography derived fractional flow
reserve (FFR) technique. However, its diagnostic accuracy has only be validated in native …