Results 11 to 20 of about 9,095,695 (256)

Diagnostic Performance of Angiography-Derived Quantitative Flow Ratio: A Systematic Review and Meta-Analysis [PDF]

Medical Sciences
Background: Quantitative flow ratio (QFR) is a novel technology to assess the functional significance of coronary stenoses based on standard coronary angiography, which can be alternatives to invasive fractional flow reserve (FFR) assessment.
Guo Huang, Pu Ge, He Zhu, Sheng Han, Luwen Shi   +4 more
doaj   +2 more sources

Quantitative flow ratio-guided surgical intervention in symptomatic myocardial bridging

Cardiology Journal, 2020
BACKGROUND: Patients with myocardial bridging (MB) are associated with adverse cardiovascular events, but a decision to perform surgical intervention, especially for patients with systolic intermediate stenosis, is a difficult clinical issue.
Quan Qi, Gang Liu, Zhize Yuan, Lili Liu, Shengxian Tu, Qiang Zhao   +5 more
doaj   +4 more sources

Reproducibility of quantitative flow ratio: An inter-core laboratory variability study

Cardiology Journal, 2020
BACKGROUND: Quantitative flow ratio (QFR) is a novel approach to derive fractional flow reserve (FFR) from coronary angiography. This study sought to evaluate the reproducibility of QFR when analyzed in independent core laboratories.
Yunxiao Chang, Liwei Chen, Jelmer Westra, Zhongwei Sun, Changdong Guan, Yimin Zhang, Daixin Ding, Bo Xu, Shengxian Tu   +8 more
doaj   +5 more sources

Quantitative flow ratio and fractional flow reserve mismatch – clinical and biochemical predictors of measurement discrepancy

Advances in Interventional Cardiology, 2019
Fractional flow reserve (FFR) is the gold standard for functional assessment of intermediate lesions. However, assessing a stenosis with pressure wire prolongs the procedure, increases costs and carries a risk of procedure-related adverse events. Quantitative flow ratio (QFR) is a wire-free method for detection of significant ischemia based on 3D ...
Martyna Zaleska, Lukasz Koltowski, Jakub Maksym, Aleksandra Chabior, Aleksandra Pohadajło, Mateusz Soliński, Mariusz Tomaniak, Grzegorz Opolski, Janusz Kochman   +8 more
doaj   +3 more sources

Quantitative flow ratio for assessment of donor vessel in patients with chronic total occlusions [PDF]

BMC Cardiovascular Disorders
Background Chronic total occlusion (CTO) is a challenging subset of coronary artery disease characterized by complete vessel obstruction and development of collateral circulation. In CTO patients, donor vessels supplying collateral flow may be at risk of
Xinjian Li, Juntao Duan, Lin Mi, Liyuan Tao, Xinye Xu, Guisong Wang   +5 more
doaj   +2 more sources

Relation of quantitative flow ratio with transit time coronary artery bypass graft flow measurement

Frontiers in Cardiovascular Medicine, 2022
BackgroundQuantitative flow ratio (QFR) is a new functional index to assess the functional significance of coronary stenosis. While whether there is an association between QFR and transit-time flow measurement (TTFM) parameters of the target coronary ...
Cong Chen, Yang Zhao, Wei Li, Kui Zhang, Haiming Dang, Taoshuai Liu, Yue Song, Jubing Zheng, Ran Dong   +8 more
doaj   +3 more sources

Sex Differences in Murray Law‐Based Quantitative Flow Ratio Among Patients With Intermediate Coronary Lesions

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2023
Background The Murray law‐based quantitative flow ratio (μQFR) is a novel technique that simulates fractional flow reserve (FFR) from a single angiographic view.
Wenjie Zuo, Renhua Sun, Zhenjun Ji, Pengfei Zuo, Xiaoguo Zhang, Rong Huang, Zaixiao Tao, Shengxian Tu, Yongjun Li, Genshan Ma   +9 more
doaj   +3 more sources

Murray law-based quantitative flow ratio versus invasive fractional flow reserve in the left anterior descending coronary artery: impact of hydrostatic pressure correction and clinical implications [PDF]

Frontiers in Cardiovascular Medicine
BackgroundInvasive fractional flow reserve (FFR) is the gold standard for guiding coronary revascularization. Angiography-derived FFR techniques such as the quantitative flow ratio (QFR) provide a less invasive alternative.
András Ágoston, András Ágoston, Ádám Piricsi, Bettina Szekeres, Mátyás Magyari, Balázs Tar, Gábor T. Szabó, Gábor T. Szabó, Csaba A. Dézsi, Csaba A. Dézsi, Zsolt Piroth, Zoltán Ruzsa, Gábor G. Tóth, Shengxian Tu, Zsolt Kőszegi, Zsolt Kőszegi, Zsolt Kőszegi   +16 more
doaj   +2 more sources

Correlation and Relative Prognostic Power of Post–Percutaneous Coronary Intervention Fractional Flow Reserve and Quantitative Flow Ratio [PDF]

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Background Post–percutaneous coronary intervention (PCI) fractional flow reserve (FFR) is an established method to evaluate the functional result of angiographically successful PCI; however, it is rarely measured.
Bettina Csanádi, Tamás Ferenci, Róbert Gál, Noémi Bora, Zsolt Piróth   +4 more
doaj   +2 more sources

Interindividual Variations in the Adenosine‐Induced Hemodynamics During Fractional Flow Reserve Evaluation: Implications for the Use of Quantitative Flow Ratio in Assessing Intermediate Coronary Stenoses

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2019
Background Quantitative flow ratio (QFR), a novel functional angiography technique, computes fractional flow reserve (FFR) without pressure wires or adenosine.
Hernán Mejía‐Rentería, Francesco María Lauri, Joo Myung Lee, Angela McInerney, Nina W. van der Hoeven, Guus A. de Waard, Antonio Fernández‐Ortiz, Carlos Macaya, Paul Knaapen, Niels van Royen, Bon‐Kwon Koo, Javier Escaned   +11 more
doaj   +3 more sources