Results 171 to 180 of about 301,214 (427)

“Virtual” (Computed) Fractional Flow Reserve

JACC: Cardiovascular Interventions, 2015
Fractional flow reserve (FFR) is the "gold standard" for assessing the physiological significance of coronary artery disease during invasive coronary angiography. FFR-guided percutaneous coronary intervention improves patient outcomes and reduces stent insertion and cost; yet, due to several practical and operator related factors, it is used in
Morris, P.D., van de Vosse, F.N., Lawford, P.V., Hose, D.R., Gunn, J.P.   +4 more
openaire   +5 more sources

Role of Variability in Microvascular Resistance on Fractional Flow Reserve and Coronary Blood Flow Velocity Reserve in Intermediate Coronary Lesions [PDF]

, 2001
Martijn Meuwissen, Steven A.J. Chamuleau, Maria Siebes, Carl E. Schotborgh, Karel T. Koch, Robbert J. de Winter, Matthijs Bax, Angelina de Jong, Jos A. E. Spaan, Jan J. Piek   +9 more
openalex   +1 more source

Measurement of fractional flow reserve to assess the functional severity of coronary-artery stenoses.

New England Journal of Medicine, 1996
BACKGROUND The clinical significance of coronary-artery stenoses of moderate severity can be difficult to determine. Myocardial fractional flow reserve (FFR) is a new index of the functional severity of coronary stenoses that is calculated from pressure ...
N. Pijls, B. Bruyne, K. Peels, P. H. Voort, H. Bonnier, J. Bartunek, J. Koolen   +6 more
semanticscholar   +1 more source

A Novel Digitalization Approach for Smart Materials – Ontology‐Based Access to Data and Models

Advanced Engineering Materials, EarlyView.
In order to access heterogeneous material data and model‐based knowledge, the established ontology‐based data access (OBDA) is extended to include material models. This novel ontology‐based data and model access (OBDMA) enables the computation of new responses beyond stored data.
Jürgen Maas, Mena Leemhuis, Jana Mertens, Hedda Schmidtke, Robert Courant, Martin Dahlmann, Sebastian Stark, Andrea Böhm, Kenny Pagel, Maximilian Hinze, Daniel Pinkal, Michael Wegener, Martin Franz‐Xaver Wagner, Thomas Sattel, Holger Neubert, Özgür Özçep   +15 more
wiley   +1 more source

Effect of High (200 μg/kg per Minute) Adenosine Dose Infusion on Fractional Flow Reserve Variability

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2016
BackgroundVariations in distal coronary pressure (Pd)/aortic pressure (Pa) ratio during steady‐state hyperemia with standard (140 μg/kg per minute) adenosine dose may hamper accurate fractional flow reserve assessment.
Dimitrios Alexopoulos, Ioanna Xanthopoulou, Grigorios Tsigkas, Nikolaos Koutsogiannis, Paraskevi Salata, Stylianos Armylagos, Athanasios Moulias, Periklis Davlouros   +7 more
doaj   +1 more source

A review on machine learning for arterial extraction and quantitative assessment on invasive coronary angiograms [PDF]

arXiv
Purpose of Review Recently, machine learning has developed rapidly in the field of medicine, playing an important role in disease diagnosis. Our aim of this paper is to provide an overview of the advancements in machine learning techniques applied to invasive coronary angiography (ICA) for segmentation of coronary arteries and quantitative evaluation ...
arxiv  

Value of fractional flow reserve in making decisions about bypass surgery for equivocal left main coronary artery disease [PDF]

, 2001
G. Jan‐Willem Bech, H Droste, Nico H.J. Pijls, B De Bruyne, J. J. R. M. Bonnier, H. R. Michels, Kathinka Peels, Jacques J. Koolen   +7 more
openalex   +1 more source

Numerical Studies of Influencing Factors on the Homogeneity of the Powder Mixture during the Powder Spreading Process of Powder Bed Fusion–Laser Beam/Metal

Advanced Engineering Materials, EarlyView.
AISI 304L stainless steel powder is mixed with silicon nitride (Si3N4) powder and processed by PBF‐LB/M, allowing partial retention of Si3N4. The numerical approach effectively predicts the Si3N4 powder homogeneity and N content distribution on the powder bed. Recent studies have focused on the alloying of nitrogen (N) in high‐alloy stainless steels by
Yuanbin Deng, Ziping Sang, Jiali Zhang, Felix Radtke, Louis Becker, Simone Herzog, Sebastian Weber, Christoph Broeckmann   +7 more
wiley   +1 more source

Comparison of myocardial fractional flow reserve and intravascular ultrasound for the assessment of slotted‐tube stents [PDF]

, 2001
Demosthenes G. Katritsis, John P.A. Ioannidis, Socrates Korovesis, Eleftherios Giazitzoglou, John Parissis, Pericles Kalivas, Michael M. Webb‐Peploe   +6 more
openalex   +1 more source

AI Evaluation of Stenosis on Coronary CT Angiography, Comparison With Quantitative Coronary Angiography and Fractional Flow Reserve: A CREDENCE Trial Substudy.

JACC Cardiovascular Imaging, 2022
W. Griffin, A. Choi, J. Riess, H. Marques, H. Chang, J. Choi, J. Doh, A. Her, B. Koo, C. Nam, Hyung-Bok Park, Sangshoon Shin, Jason H. Cole, A. Gimelli, M. Khan, B. Lu, Yang Gao, F. Nabi, R. Nakazato, U. Schoepf, R. Driessen, M. Bom, Randall C. Thompson, James J. Jang, M. Ridner, C. Rowan, E. Avelar, P. Généreux, P. Knaapen, Guus A de Waard, G. Pontone, D. Andreini, J. Earls   +32 more
semanticscholar   +1 more source