Results 81 to 90 of about 6,364,051 (298)

Diagnostic Value of Global Cardiac Strain in Patients With Myocarditis

, 2020
BACKGROUND: Cardiac strain represents an imaging biomarker of contractile dysfunction. PURPOSE: The purpose of this study was to investigate the diagnostic value of cardiac strain obtained by feature-tracking cardiac magnetic resonance (MR) in acute ...
Monti C. B., Sardanelli F., Cannao P. M., Carbone F. S., Secchi F., Ali M., Marco Alì, Francesco Sardanelli, Francesco Secchi, Paola Maria Cannaò, Caterina Beatrice Monti, Francesco Saverio Carbone   +11 more
core   +1 more source

Continuum Mechanics Modeling of Flexible Spring Joints in Surgical Robots

Advanced Robotics Research, EarlyView.
A new mechanical model of a tendon‐actuated helical extension spring joint in surgical robots is built using Cosserat rod theory. The model can implicitly handle the unknown contacts between adjacent coils and numerically predict spring shapes from straight to significantly bent under actuation forces.
Botian Sun, Liang Zhang, Jianwen Zeng, Xuefeng Wang   +3 more
wiley   +1 more source

Assessment of left ventricular myocardial systolic dysfunction in premature ovarian insufficiency patients using echocardiographic layer-specific myocardial strain imaging

Echo Research and Practice
Background Due to the lack of oestrogen, premature ovarian insufficiency (POI) is an independent risk factor for ischaemic heart disease and overall cardiovascular disease. This study aimed to apply layer-specific myocardial strain for early quantitative
Yu-Lin Wang, Li-Xue Yin, Mei Li
doaj   +1 more source

Flexible Sensors for Robotics Tactile Perception: A Review

Advanced Robotics Research, EarlyView.
Flexible tactile sensing for robotics is reviewed through four interconnected dimensions. Physical mechanisms include piezoresistive, capacitive, piezoelectric, triboelectric, iontronic, and optical sensing. Structural design includes bioinspired, defect‐based, and MEMS‐based tactile systems.
Yu Song, Ying Chen, Yihao Chen, Xue Feng
wiley   +1 more source

Detection of subclinical myocardial dysfunction in cocaine addicts with feature tracking cardiovascular magnetic resonance

Journal of Cardiovascular Magnetic Resonance, 2020
Background Cocaine is an addictive, sympathomimetic drug with potentially lethal effects. We have previously shown with cardiovascular magnetic resonance (CMR) the presence of cardiovascular involvement in a significant percentage of consecutive ...
Alicia M. Maceira, Sara Guardiola, Carmen Ripoll, Juan Cosin-Sales, Vicente Belloch, Jose Salazar   +5 more
doaj   +1 more source

Left ventricular systolic function impairment in children after balloon valvuloplasty for congenital aortic stenosis assessed by 2D speckle tracking echocardiography.

PLoS ONE, 2021
AimsThe aim of the study was to evaluate left ventricular (LV) remodeling and systolic function using two-dimensional speckle tracking echocardiographic (2D STE) imaging in children at a long-term (more than 36 months, 107.5±57.8 months) after balloon ...
Krzysztof Godlewski, Paweł Dryżek, Elżbieta Sadurska, Bożena Werner   +3 more
doaj   +1 more source

Circumferential strain by velocity vector imaging and speckle-tracking echocardiography: validation against sonomicrometry in an aortic phantom

, 2017
BACKGROUND: Evaluation of arterial deformation and mechanics using strain analysis on ultrasound greyscale images has gained increasing scientific interest. The aim of this study was to validate in vitro measurements of circumferential strain by velocity
Petrini, J., Larsson, M., Gothenburg University., Göteborgs universitet., Caidahl, Kenneth,, Eriksson, M. J.   +5 more
core   +1 more source

Representative examples of descending aortic strain assessed pre- and post- ascending aortic graft implantation in patients with congenital or genetically associated AA associated (top) and degenerative (bottom) AA.

, 2020
Circumferential strain over the entire cardiac cycle is represented by the red curve (upper right panel) from which systolic and diastolic frames were used to compute global circumferential strain (GCS); corresponding end-diastolic and end-systolic ...
Maria C. Palumbo (3293220), Jonathan Butcher (136489), Leonard N. Girardi (8565939), Pedram Navid (8565930), Lisa Q. Rong (8565927), Alberto Redaelli (2285731), Razia Sultana (2445769), Mary J. Roman (8565933), Jiwon Kim (573413), Richard B. Devereux (8565936), Jonathan W. Weinsaft (7485740), Mario F. L. Gaudino (6837846)   +11 more
core   +1 more source

In Situ Stress‐Dispersing Hydrogel Millispheres via Load Redistribution to Restore Nucleus Pulposus Metabolic Homeostasis

Advanced Science, EarlyView.
Local stress concentration disrupts metabolic homeostasis and induces inflammation in the nucleus pulposus (NP), thereby accelerating intervertebral disc degeneration (IDD). A biomimetic HA/ChS hydrogel millimeter sphere (ChS@HM) is developed to enable synergistic stress dispersion and sustained hydration lubrication.
Ang Li, Hui Yuan, Honglei Xiao, Xiaodong Liu, Wenguo Cui   +4 more
wiley   +1 more source

Left ventricular strain‐curve morphology to distinguish between constrictive pericarditis and restrictive cardiomyopathy

ESC Heart Failure, 2021
Aims To distinguish between constrictive pericarditis (CP) and restrictive cardiomyopathy (RCM) using cardiac magnetic resonance feature tracking (CMR‐FT) left ventricle (LV) diastolic time–strain curve patterns and myocardial strain. Methods and Results
Zhiyun Yang, Hui Wang, Sanshuai Chang, Jing Cui, Lu Zhou, Qiang Lv, Yi He, Xin Du, Jianzeng Dong, Changsheng Ma   +9 more
doaj   +1 more source