Results 121 to 130 of about 111,080 (399)

Coronary flow reserve and microcirculatory resistance in patients with coronary tortuosity and without atherosclerosis

Journal of International Medical Research, 2020
Objective Coronary tortuosity may affect epicardial coronary arterial blood flow. This study aimed to investigate the effect of coronary tortuosity on coronary flow reserve and the coronary microcirculation in patients without apparent coronary ...
Yang Li, Xiaoguo Zhang, Qiming Dai, Genshan Ma   +3 more
doaj   +1 more source

Impact of Right Atrial Pressure on Fractional Flow Reserve Measurements

JACC: Cardiovascular Interventions, 2016
This study sought to assess the impact of a wide range of mean right atrial pressure (Pra) on fractional flow reserve (FFR) measurements.FFR invasively assesses the ischemic potential of coronary stenoses. FFR is calculated as the ratio of mean distal coronary pressure (Pd) to mean aortic pressure (Pa) during maximal hyperemia. The Pra is considered to
Toth, Gabor G, De Bruyne, Bernard, Rusinaru, Dan, DI GIOIA, GIUSEPPE, Bartunek, Jozef, PELLICANO, MARIANO, Vanderheyden, Marc, Adjedj, Julien, Wijns, William, Pijls, Nico H. J, BARBATO, EMANUELE   +10 more
openaire   +5 more sources

Mechanical Behavior and Microstructural Changes Associated with Tensile Deformation above the Martensite Start Temperature during Quenching and Subsequent Partitioning of a Low‐Alloy 37SiB6 Steel

Advanced Engineering Materials, EarlyView.
A new experimental setup, incorporating digital image correlation and infrared thermography in combination with inductive‐conductive heating for precise temperature control, is used to analyze the mechanical behavior and microstructural changes of sheet metal under complex thermomechanical test conditions that represent quench and partitioning ...
Christian Illgen, Benjamin Bohne, Sven Winter, Marcus Böhme, Martin F.-X. Wagner   +4 more
wiley   +1 more source

Intravascular Imaging Findings After PCI in Patients With Focal and Diffuse Coronary Artery Disease

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Background Following percutaneous coronary intervention (PCI), optical coherence tomography provides prognosis information. The pullback pressure gradient is a novel index that discriminates focal from diffuse coronary artery disease based on fractional ...
Hirofumi Ohashi, Takuya Mizukami, Jeroen Sonck, Frederic Bouisset, Brian Ko, Bjarne L. Nørgaard, Michael Mæng, Jesper Møller Jensen, Koshiro Sakai, Hirohiko Ando, Tetsuya Amano, Nicolas Amabile, Ziad Ali, Bernard De Bruyne, Bon‐Kwon Koo, Hiromasa Otake, Carlos Collet   +16 more
doaj   +1 more source

Diagnostic Accuracy of a Machine-Learning Approach to Coronary Computed Tomographic Angiography–Based Fractional Flow Reserve: Result From the MACHINE Consortium

Circulation Cardiovascular Imaging, 2018
Background: Coronary computed tomographic angiography (CTA) is a reliable modality to detect coronary artery disease. However, CTA generally overestimates stenosis severity compared with invasive angiography, and angiographic stenosis does not ...
Adriaan Coenen, Young-Hak Kim, M. Kruk, C. Tesche, J. Geer, A. Kurata, M. Lubbers, J. Daemen, L. Itu, S. Rapaka, Puneet S. Sharma, C. Schwemmer, A. Persson, J. Schoepf, C. Kepka, D. Yang, K. Nieman   +16 more
semanticscholar   +1 more source

Residual Stress States in Microstructurally Graded PBF–LB/M Austenitic Steel Components

Advanced Engineering Materials, EarlyView.
This study examines microstructurally graded 316L rectangular tube profiles fabricated via PBF–LB/M using a dual‐laser system. A 1 kW top‐hat and a 400 W Gaussian laser create distinct grain sizes and crystallographic texture. Mechanical properties are linked to microstructural evolution driven by processing conditions.
Nico Möller, Florian Loebich, Thomas Wegener, Julia Richter, Jens Gibmeier, Thomas Niendorf   +5 more
wiley   +1 more source

Diagnostic accuracy of myocardial perfusion imaging with czt technology. Systemic review and meta-analysis of comparison with invasive coronary angiography [PDF]

, 2017
OBJECTIVES: This study sought to summarize the evidence on stress myocardial perfusion imaging (MPI) using cadmium-zinc-telluride (CZT) technology for the diagnosis of obstructive coronary artery disease (CAD). The CZT cameras are newly introduced, and
Biondi-Zoccai, Giuseppe, Frati, Giacomo, Iskandrian, Ami E., Nudi, Francesco, Peruzzi, Mariangela, Schillaci, Orazio   +5 more
core   +2 more sources

Evaluation of Myocardial Ischemia Using Coronary Computed Tomography Angiography in Patients with Stable Angina

대한영상의학회지, 2020
Assessment of myocardial ischemia in patients with stable angina is important in deciding whether to treat coronary artery disease and in predicting clinical outcome.
Sung Min Ko
doaj   +1 more source

Real-world clinical utility and impact on clinical decision-making of coronary computed tomography angiography-derived fractional flow reserve: lessons from the ADVANCE Registry

European Heart Journal, 2018
Aims Non-invasive assessment of stable chest pain patients is a critical determinant of resource utilization and clinical outcomes. Increasingly coronary computed tomography angiography (CCTA) with selective CCTA-derived fractional flow reserve (FFRCT ...
T. Fairbairn, K. Nieman, T. Akasaka, B. Nørgaard, D. Berman, G. Raff, L. Hurwitz-Koweek, G. Pontone, T. Kawasaki, N. Sand, J. Jensen, T. Amano, M. Poon, Kristian A. Øvrehus, J. Sonck, M. Rabbat, S. Mullen, B. de Bruyne, C. Rogers, H. Matsuo, Jeroen J. Bax, J. Leipsic, M. Patel   +22 more
semanticscholar   +1 more source

Feasibility and Validity of Computed Tomography-Derived Fractional Flow Reserve in Patients With Severe Aortic Stenosis: The CAST-FFR Study.

Circulation. Cardiovascular Interventions, 2020
BACKGROUND Coronary artery disease is common in patients with severe aortic stenosis. Computed tomography-derived fractional flow reserve (CT-FFR) is a clinically used modality for assessing coronary artery disease, however, its use has not been ...
M. Michail, A. Ihdayhid, A. Comella, U. Thakur, J. Cameron, L. McCormick, R. Gooley, S. Nicholls, A. Mathur, A. Hughes, B. Ko, Adam J. Brown   +11 more
semanticscholar   +1 more source