Diastolic Pressure Ratio: New Approach and Validation vs. the Instantaneous Wave-Free Ratio. [PDF]
European Heart Journal, 2019 Abstract Aims The instantaneous wave-free ratio (iFR) and whole-cycle Pd/Pa investigate coronary physiology during non-hyperaemic conditions. To test for unique physiologic properties of the wave-free period when making resting coronary pressure measurements, we compared post hoc a diastolic pressure ...
Nils P Johnson +2 more
exaly +6 more sources
Diagnostic Agreement of Quantitative Flow Ratio With Fractional Flow Reserve and Instantaneous Wave‐Free Ratio [PDF]
Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2019 Background Quantitative flow ratio (QFR) has a high diagnostic accuracy in assessing functional stenoses relevance, as judged by fractional flow reserve (FFR). However, its diagnostic performance has not been thoroughly evaluated using instantaneous wave‐
Doyeon Hwang +22 more
doaj +6 more sources
Clinical Outcome of Revascularization Deferral With Instantaneous Wave‐Free Ratio and Fractional Flow Reserve: A 5‐Year Follow‐Up Substudy From the iFR‐SWEDEHEART Trial [PDF]
Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2023 Background Although physiology‐based assessment of coronary artery stenosis using instantaneous wave‐free ratio (iFR) and fractional flow reserve (FFR) are established methods of guiding coronary revascularization, its clinical outcome in long‐term ...
Karolina Berntorp +7 more
doaj +5 more sources
Análise comparativa do fractional flow reserve (FFR) e do instantaneous wave‐free ratio (iFR): resultados de um registo de 5 anos [PDF]
Revista Portuguesa de Cardiologia, 2018 Resumo: Introdução e objetivos: A avaliação de lesões coronárias pelo instantaneous wave free ratio (iFR) tem gerado debate. Pretendeu‐se analisar o desempenho diagnóstico do iFR e o seu impacto na decisão de usar o fractional flow reserve (FFR) e nas ...
Miguel Nobre Menezes +10 more
doaj +10 more sources
Fractional Flow Reserve and Instantaneous Wave‐Free Ratio Predict Pathological Wall Shear Stress in Coronary Arteries: Implications for Understanding the Pathophysiological Impact of Functionally Significant Coronary Stenoses [PDF]
Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2022 Background The pathophysiological mechanism behind adverse outcomes associated with ischemia‐inducing epicardial coronary stenoses and microcirculatory dysfunction remains unclear. Wall shear stress (WSS) plays an important role in atherosclerotic plaque
Christopher C. Y. Wong +8 more
doaj +3 more sources
Dataset on blood flow and instantaneous wave-free ratio in normal and stenosed coronary arteries [PDF]
Data in Brief, 2020 Instantaneous wave-free ratio (iFR) has been proposed as a hemodynamic parameter that can reliably reflect the blood flow in stenosed coronary arteries. Currently, there are few investigations on the quantitative analysis of iFR in the patients regarding
Haipeng Liu +9 more
doaj +4 more sources
DFENet: Deep Feature Enhancement Network for Accurate Calculation of Instantaneous Wave-Free Ratio [PDF]
IEEE Journal of Translational Engineering in Health and Medicine, 2020 Accurate iFR calculation can provide important clinical information for intracoronary functional assessment without administration of adenosine, which needs to locate object points in the pressure waveforms: peak, the dichrotic notch and the pressure ...
Jiping Li, Liang Song, Heye Zhang
doaj +4 more sources
Adverse Plaque Characteristics Relate More Strongly With Hyperemic Fractional Flow Reserve and Instantaneous Wave-Free Ratio Than With Resting Instantaneous Wave-Free Ratio [PDF]
JACC: Cardiovascular Imaging, 2020 The current substudy of the PACIFIC (Prospective Comparison of Cardiac PET/CT, SPECT/CT Perfusion Imaging and CT Coronary Angiography With Invasive Coronary Angiography) trial explores the impact of computed tomography (CT)-derived unfavorable plaque features on both hyperemic and non-hyperemic flow indices.Next to lesion severity, plaque vulnerability
Justine I Davies +2 more
exaly +9 more sources
Long‐Term Clinical Outcomes of Nonhyperemic Pressure Ratios: Resting Full‐Cycle Ratio, Diastolic Pressure Ratio, and Instantaneous Wave‐Free Ratio [PDF]
Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2020 Background Nonhyperemic pressure ratios (NHPRs) such as instantaneous wave‐free ratio, resting full‐cycle ratio, or diastolic pressure ratio have emerged as invasive physiologic indices precluding the need for hyperemic agents.
Joo Myung Lee +17 more
doaj +4 more sources
Understanding Fractional Flow Reserve/Instantaneous Wave‐Free Ratio Discordance Can Provide Coronary Clarity [PDF]
Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2022 David M. Tehrani, Arnold H. Seto
doaj +4 more sources