Ischemic ECG changes during dobutamine stress echocardiography (DSE) have been reported to have low sensitivity and specificity for detecting myocardial ischemia in the absence of wall motion abnormalities on echocardiography. We present a case of a renal transplant candidate with severe multivessel disease who had ST depressions without any wall motion abnormalities on DSE. Certain studies have shown the sensitivity of DSE is lower in patients with left ventricular hypertrophy and/or end stage renal disease, but the significance of ischemic ECG changes with no evidence of wall motion abnormalities in these patients has not been well studied.
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http://dx.doi.org/10.1016/j.jelectrocard.2019.04.008 | DOI Listing |
Bioinspir Biomim
January 2025
I.R.P.H.E., Aix-Marseille Universite, 49, rue Frédéric Joliot-Curie, Marseille, 13384, FRANCE.
The implementation of collective motion, traditionally, disregard the limited sensing capabilities of an individual, to instead assuming an omniscient perception of the environment. This study implements a visual flocking model in a ``robot-in-the-loop'' approach to reproduce these behaviors with a flock composed of 10 independent spherical robots. The model achieves robotic collective motion by only using panoramic visual information of each robot, such as retinal position, optical size and optic flow of the neighboring robots.
View Article and Find Full Text PDFEur Heart J Imaging Methods Pract
January 2025
Department of Radiology, University of Michigan, 1500 E Medical Center Drive, CVC 5581, Ann Arbor, MI 48109, USA.
Aims: Aortic wall stiffening in ascending thoracic aortic aneurysm (aTAA) is common. However, the spatial and temporal relationships between stiffness, aortic size, and growth in aTAA remain unclear.
Methods And Results: In this single-centre retrospective study, we utilized vascular deformation mapping to extract multi-directional aortic motion, aortic distensibility, and aortic growth in a multi-planar fashion from multi-phasic ECG-gated computed tomography angiograms.
ACS Nano
January 2025
Chandra Family Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, United States.
Spiking neural networks seek to emulate biological computation through interconnected artificial neuron and synapse devices. Spintronic neurons can leverage magnetization physics to mimic biological neuron functions, such as integration tied to magnetic domain wall (DW) propagation in a patterned nanotrack and firing tied to the resistance change of a magnetic tunnel junction (MTJ), captured in the domain wall-magnetic tunnel junction (DW-MTJ) device. Leaking, relaxation of a neuron when it is not under stimulation, is also predicted to be implemented based on DW drift as a DW relaxes to a low energy position, but it has not been well explored or demonstrated in device prototypes.
View Article and Find Full Text PDFHeliyon
January 2025
Institute of Mathematics, Henan Academy of Sciences, Zhengzhou, 450046, China.
This study examines the behavior of the Casson nanofluid bioconvection flow around a spinning disc under various influences, including gyrotactic microorganisms, multiple slips, and thermal radiation. Notably, it accounts for the reversible nature of the flow and incorporates the esterification process. The aim of this study is to investigate the influence of reversible chemical reactions on the flow behavior of a Casson nanofluid in the presence of bioconvective microorganisms over a spinning disc.
View Article and Find Full Text PDFKorean Circ J
January 2025
Imaging Department, Harefield Hospital, Royal Brompton and Harefield Hospitals, Harefield, United Kingdom.
Stress echocardiography has evolved from the sole assessment of regional wall motion abnormalities (RWMAs) to the ABCDE protocol, as recommended by the recent clinical consensus statement from the European Association of Cardiovascular Imaging, reflecting the need for a more systematic patient assessment. Steps A, B, C, D, and E assess RWMAs, lung B-lines, left ventricular contractile reserve, coronary flow velocity reserve (CFVR) in mid-distal left anterior descending artery, and heart rate reserve, respectively. Impairment of CFVR is considered as the earliest abnormality in the ischaemic cascade.
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