Results 101 to 110 of about 64,835 (288)

Acute Effects of Smoking and Vaping on Markers of Vascular Function via Quantitative MRI

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background E‐cigarettes contribute to endothelial dysfunction, a known cause of systemic atherosclerotic disease that cannot be adequately characterized by a single physiological parameter measured at a single vascular bed. Purpose/Hypothesis Quantify and compare acute effects of smoking or vaping with tobacco cigarettes (t‐cigs), nicotinized ...
Marianne Nabbout, Mahdie Hosseini, Harris Quach, Michael C. Langham, Alessandra S. Caporale, Wensheng Guo, Kathryn Jaroszynski, Frank T. Leone, Andrew A. Strasser, Felix W. Wehrli   +9 more
wiley   +1 more source

Autonomous Velocity Encoding (VENC) Selection Improves Precision of Quantitative Flow Measurement

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background The optimal velocity encoding limit (VENC) in phase contrast MRI is subject‐specific because it depends on peak flow rate and the presence of flow jets. Currently, VENC is set manually with limited prior knowledge of the peak velocity. Setting the correct VENC might improve measurement precision or shorten scan times.
Pierre Daudé, Rajiv Ramasawmy, Christine Mancini, Dominique Franson, Sunggun Lee, Anastasia Tsakirellis, W. Patricia Bandettini, Ahsan Javed, Kelvin Chow, Adrienne E. Campbell‐Washburn   +9 more
wiley   +1 more source

Systoles on Punctured Spheres

Geometriae Dedicata
Abstract We determine the maximal number of systoles among all spheres with n punctures endowed with a complete Riemannian metric of finite area.
Baader, Sebastian, Jörg, Jasmin
openaire   +3 more sources

Comparative Performance Analysis of an Open Source Motion‐Compensated Cardiac Diffusion Sequence Across Different MRI Systems and Gradient Strengths—A Pilot Study

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To validate the performance of an open‐source cardiac diffusion sequence framework and to investigate hardware‐based performance differences. Methods Three second order motion compensated sequence files were compiled using Pulseq and applied across different MRI systems to image five volunteers.
Eric Arbes, Ariel Hannum, Johannes Fischer, Qingping Chen, Sebastian Littin, Alexander Maier, Michael Bock, Simon Reiss   +7 more
wiley   +1 more source

Fuzzy logika alkalmazása a páciens monitorozásban

Bánki Közlemények, 2019
Az orvosi gyakorlatban az emberi szervezetben mérhető értékekhez a legtöbb esetben egy általános határértéket adnak meg, hogy az adott paraméter mettől-meddig normál értékű. A valóságban a határok egyénenként változnak, mert a korunk, a környezetünk, az
Anna Krisztina Tamás, Edit Tóth-Laufer
doaj  

Amphibian: heart: atrial systole

, 2014
It shows the dorsal view of an anuran’s heart. It highlights the atrial systole and the ventricular diastole synchronismEducação Superior::Ciências Biológicas::MorfologiaEducação Superior::Ciências Agrárias::Medicina VeterináriaEducação Superior ...
Sebben, Antonio
core  

Motion‐Robust Approach for 4D Cardiac Cine Using 2D Real‐Time Acquisitions and Slice‐to‐Volume Reconstruction

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose 4D cardiac cine is a powerful tool for comprehensive cardiac function assessment; however, current methods rely on regular breathing and are sensitive to bulk motion and arrhythmia. We aim to develop a 4D cardiac cine approach that requires no patient cooperation and is robust to irregular breathing, bulk motion, and cardiac arrhythmia.
Ye Tian, Anand A. Joshi, Jon A. Detterich, John C. Wood, Krishna S. Nayak   +4 more
wiley   +1 more source

Hemodynamic effects of altering the timing of atrial systole

, 1963
The use of heart block dog preparations allowed an investigation at constant ventricular rates of the hemodynamic effects which resulted when the timing of atrial systole was altered relative to ventricular systole.
N. Sheldon Skinner, Stanley J. Sarnoff, Jere H. Mitchell, Andrew G. Wallace   +3 more
core   +1 more source

Agreement between cardiac cycle time intervals and myocardial velocities measured by automated analysis of color tissue Doppler cine loops and by manual tracing of spectral pulsed‐wave tissue Doppler waveforms of sheep fetal heart under normal and pathological conditions: An experimental study

Acta Obstetricia et Gynecologica Scandinavica, EarlyView.
Automated cTDI in sheep fetuses provided reproducible measurements of myocardial velocities and heart rate that align well with manual pulsed‐wave TDI. For cardiac cycle duration metrics, the two modalities are not interchangeable. These findings support that automated cTDI is well suited for longitudinal assessment under both physiological and ...
Juulia Lantto, Maria Grazia Morena, Heikki Huhta, Amar Bhide, Jonas Johnson, Juha Räsänen, Ganesh Acharya   +6 more
wiley   +1 more source

sGC stimulator BAY 41‐8543 improves survival and ventricular function in a rat model of doxorubicin‐induced cardiomyopathy with nephrotic syndrome

British Journal of Pharmacology, EarlyView.
Abstract Background and Purpose Anthracyclines such as doxorubicin (DOXO) remain a cornerstone of cancer therapy but are associated with a high risk of cardiotoxicity and subsequent heart failure (HF). Impairment of NO/soluble guanylyl cyclase (sGC)/cGMP pathway has been reported in anthracycline‐induced cardiomyopathy.
Olga Gawrys, Petra Škaroupková, Soňa Kikerlová, Zdeňka Vaňourková, Martina Hüttl, Olga Lenčová, Kasin Yadunandam Anandam, Svenja Stomberg, Sönke Behrends, Barbara Szeiffová Bačová, Matúš Sykora, Lisa Dietz, Peter Sandner, Luděk Červenka, Martin Štěrba   +14 more
wiley   +1 more source