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https://www.readbyqxmd.com/read/29661525/a-preliminary-study-of-left-ventricular-rotational-mechanics-in-children-with-noncompaction-cardiomyopathy-do-they-influence-ventricular-function
#1
Hythem M Nawaytou, Andrea E Montero, Putri Yubbu, Renzo J C Calderón-Anyosa, Tomoyuki Sato, Matthew J O'Connor, Kelley D Miller, Philip C Ursell, Julien I E Hoffman, Anirban Banerjee
BACKGROUND: Current diagnostic criteria for noncompaction cardiomyopathy (NCC) lack specificity, and the disease lacks prognostic indicators. Reverse apical rotation (RAR) with abnormal rotation of the cardiac apex in the same clockwise direction as the base has been described in adults with NCC. The aim of this study was to test the hypothesis that RAR might differentiate between symptomatic NCC and benign hypertrabeculations and might be associated with ventricular dysfunction. METHODS: Echocardiograms from 28 children with NCC without cardiac malformations were prospectively compared with those from 29 age-matched normal control subjects...
April 13, 2018: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29655509/reduced-right-ventricular-fractional-area-change-strain-and-strain-rate-before-bidirectional-cavopulmonary-anastomosis-is-associated-with-medium-term-mortality-for-children-with-hypoplastic-left-heart-syndrome
#2
Lily Q Lin, Jennifer Conway, Silvia Alvarez, Benjamin Goot, Jesus Serrano-Lomelin, Timothy Colen, Edythe B Tham, Shelby Kutty, Ling Li, Nee Scze Khoo
BACKGROUND: Ventricular dysfunction is associated with increased morbidity and mortality in children with hypoplastic left heart syndrome. The aim of this study was to assess the diagnostic performance of conventional and speckle-tracking echocardiographic measures of right ventricular (RV) function before bidirectional cavopulmonary anastomosis palliation in predicting death or need for heart transplantation (HTx). METHODS: RV fractional area change (RVFAC) and longitudinal and circumferential strain and strain rate (SR) were measured in 64 prospectively recruited patients with hypoplastic left heart syndrome from echocardiograms obtained before bidirectional cavopulmonary anastomosis surgery...
April 12, 2018: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29648902/diagnostic-evaluation-in-steroid-induced-myopathy-case-report-suggesting-clinical-utility-of-quantitative-muscle-ultrasonography
#3
Marco Alessandro Minetto, Cristina Caresio, Valentina D'Angelo, Fabio Lanfranco, Lucia Ghizzoni, Silvestro Roatta, Emanuela Arvat, Santosh Kesari
PURPOSE: We present a patient with adrenal Cushing's syndrome causing steroid myopathy. The purpose of the case report is to illustrate the clinical usefulness of quantitative muscle ultrasonography for the assessment of glucocorticoid-induced changes in muscle mass (MM) and structure. METHODS: Assessments of physical performance, muscle strength, MM (i.e., total body skeletal MM, appendicular skeletal MM, and thickness of lower limb muscles), and muscle structure (i...
April 12, 2018: Endocrine Research
https://www.readbyqxmd.com/read/29642595/%C3%AE-generalized-labeled-multi-bernoulli-filter-using-amplitude-information-of-neighboring-cells
#4
Chao Liu, Jinping Sun, Peng Lei, Yaolong Qi
The amplitude information (AI) of echoed signals plays an important role in radar target detection and tracking. A lot of research shows that the introduction of AI enables the tracking algorithm to distinguish targets from clutter better and then improves the performance of data association. The current AI-aided tracking algorithms only consider the signal amplitude in the range-azimuth cell where measurement exists. However, since radar echoes always contain backscattered signals from multiple cells, the useful information of neighboring cells would be lost if directly applying those existing methods...
April 10, 2018: Sensors
https://www.readbyqxmd.com/read/29622500/max-dd-dt-a-novel-parameter-to-assess-fetal-cardiac-contractility-and-a-substitute-for-max-dp-dt
#5
Yasuyuki Fujita, Ryo Kiyokoba, Yasuo Yumoto, Kiyoko Kato
Aortic pulse waveforms are composed of a forward wave from the heart and a reflection wave from the periphery. We focused on this forward wave and suggested a new parameter, the maximum slope of aortic pulse waveforms (max dD/dt), for fetal cardiac contractility. Max dD/dt was calculated from fetal aortic pulse waveforms recorded with an echo-tracking system. A normal range of max dD/dt was constructed in 105 healthy fetuses using linear regression analysis. Twenty-two fetuses with suspected fetal cardiac dysfunction were divided into normal and decreased max dD/dt groups, and their clinical parameters were compared...
April 2, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29618968/managing-clutter-in-a-high-pulse-rate-echolocation-system
#6
Jacob Isbell, Timothy K Horiuchi
The use of echolocation for navigating in dense, cluttered environments is a challenge due to the need for rapid sampling of nearby objects in the face of delayed echoes from distant objects. In the wild, echolocating bats frequently encounter this situation when leaving the roost or while hunting. If long-delay echoes from a distant object are received after the next pulse is sent out, these "aliased" echoes appear as close-range phantom objects. Little is known about how bats cope with these situations...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29605969/latent-myopathy-is-more-pronounced-in-patients-with-low-flow-versus-normal-flow-aortic-stenosis-with-normal-left-ventricular-ejection-fraction-who-are-undergoing-surgical-aortic-valve-replacement-multicenter-study-with-a-brief-review-of-the-literature
#7
Azhar Supariwala, Monica Sanchez-Ross, Valentin Suma, Karthik Seetharam, Daniel Marrero, Daniel Swistel, Sandhya Balaram, Farooq A Chaudhry
BACKGROUND: Midwall fibrosis and low stroke volume are independent predictors of mortality in severe aortic stenosis (AS) with preserved LV ejection fraction (LVEF). The role of speckle tracking echocardiography (STE) to identify latent myopathy pre- and post- aortic valve replacement (AVR) in high risk AS patients with normal LVEF is limited. METHODS: Demographic, 2D echocardiographic, and STE data were analyzed in patients with severe AS and preserved LVEF who underwent tissue AVR...
April 1, 2018: Echocardiography
https://www.readbyqxmd.com/read/29573022/exploration-of-male-urethral-sphincter-complex-using-diffusion-tensor-imaging-dti-based-fiber-tracking
#8
Shantanu Sinha, Usha Sinha, Vadim Malis, Valmik Bhargava, Kyoko Sakamoto, Mahadevan Rajasekaran
BACKGROUND: Urinary incontinence is a major clinical problem arising primarily from age-related degenerative changes to the sphincter muscles. However, the precise anatomy of the normal male sphincter muscles has yet to be established. Diffusion tensor imaging (DTI) may offer a unique insight into muscle microstructure and fiber architecture. PURPOSE: To explore the anatomy of the urethral sphincter muscles pertinent to urinary continence function using DT-MRI. STUDY TYPE: Prospective cohort study...
March 23, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29572938/prognostic-value-of-echocardiographic-indices-of-left-atrial-morphology-and-function-in-dogs-with-myxomatous-mitral-valve-disease
#9
Marco Baron Toaldo, Giovanni Romito, Carlo Guglielmini, Alessia Diana, Nazzareno G Pelle, Barbara Contiero, Mario Cipone
BACKGROUND: The prognostic relevance of left atrial (LA) morphological and functional variables, including those derived from speckle tracking echocardiography (STE), has been little investigated in veterinary medicine. OBJECTIVES: To assess the prognostic value of several echocardiographic variables, with a focus on LA morphological and functional variables in dogs with myxomatous mitral valve disease (MMVD). ANIMALS: One-hundred and fifteen dogs of different breeds with MMVD...
March 23, 2018: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29561964/mid-term-results-of-surgical-treatment-of-atrial-fibrillation-in-valvular-heart-disease-assesed-by-speckle-tracking-echocardiography
#10
Natalia Lorenzo, Irene Mendez, Mikel Taibo, Gianfranco Martinis, Sara Badia, Guillermo Reyes, Rio Aguilar
BACKGROUND: Atrial fibrillation frequently affects patients with valvular heart disease. Ablation of atrial fibrillation during valvular surgery is an alternative for restoring sinus rhythm. OBJECTIVES: This study aimed to evaluate mid-term results of successful atrial fibrillation surgical ablation during valvular heart disease surgery, to explore left atrium post-ablation mechanics and to identify predictors of recurrence. METHODS: Fifty-three consecutive candidates were included...
March 19, 2018: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/29526882/thin-slice-free-breathing-pseudo-golden-angle-radial-stack-of-stars-with-gating-and-tracking-t1-weighted-acquisition-an-efficient-gadoxetic-acid-enhanced-hepatobiliary-phase-imaging-alternative-for-patients-with-unstable-breath-holding
#11
Kimihiro Kajita, Satoshi Goshima, Yoshifumi Noda, Hiroshi Kawada, Nobuyuki Kawai, Tomoyuki Okuaki, Masatoshi Honda, Masayuki Matsuo
PURPOSE: To compare four free-breathing scan techniques for gadoxetic acid-enhanced hepatobiliary phase imaging with conventional breath-hold scans. MATERIALS AND METHODS: Gadoxetic acid-enhanced hepatobiliary phase imaging with six image acquisition sets performed in 50 patients. Image acquisition sets included fat-suppressed 3D T1 -weighted turbo field echo with free-breathing pseudo-golden-angle radial stack-of-stars (FBRS) acquisition, FBRS with track (FBRST ), FBRS with gate and track (FBRSG&T ), thin-slice FBRS with gate and track (thin-slice FBRSG&T ), free-breathing Cartesian acquisition (CartesianFB ), and breath-hold Cartesian acquisition (CartesianBH )...
March 9, 2018: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/29526564/normative-data-for-left-and-right-ventricular-systolic-strain-in-healthy-caucasian-italian-children-by-two-dimensional-speckle-tracking-echocardiography
#12
Massimiliano Cantinotti, Marco Scalese, Raffaele Giordano, Eliana Franchi, Nadia Assanta, Marco Marotta, Cecilia Viacava, Sabrina Molinaro, Giorgio Iervasi, Giuseppe Santoro, Martin Koestenberger
BACKGROUND: There is an increasing interest in echocardiographic strain (ε) measurements for the assessment of ventricular myocardial function in children; however, pediatric nomograms remain limited. Our aim was to establish pediatric nomograms for the left ventricular (LV) and the right ventricular (RV) ε measured by two-dimensional speckle-tracking echocardiography (2D-STE) in a large cohort of healthy children prospectively enrolled. METHODS: Echocardiographic measurements included STE LV longitudinal and circumferential and RV longitudinal global end-systolic ε...
March 8, 2018: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29523920/diminished-cardiac-performance-and-left-ventricular-dimensions-in-neonates-with-congenital-diaphragmatic-hernia
#13
Gabriel Altit, Shazia Bhombal, Krisa Van Meurs, Theresa A Tacy
INTRODUCTION: Newborns with congenital diaphragmatic hernia (CDH) have varying degrees of pulmonary hypoplasia and pulmonary hypertension (PH), and there is limited evidence that cardiac dysfunction is present. We sought to study early neonatal biventricular function and performance in these patients by reviewing early post-natal echocardiography (ECHO) measurements and comparing them to normal term newborns. METHODS: Retrospective case-control study reviewing clinical and ECHO data on term newborns with CDH and normal controls born between 2009 and 2016...
March 9, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29509967/early-modifications-of-cardiac-function-in-preterm-neonates-using-speckle-tracking-echocardiography
#14
Biagio Castaldi, Giulia Bordin, Valentina Favero, Daniel Nardo, Francesca Previati, Sabrina Salvadori, Eugenio Baraldi, Ornella Milanesi
BACKGROUND AND AIMS: Preterm newborns undergo hemodynamic challenges in the postnatal period. The aim of this study was to investigate myocardial mechanics changes in the postnatal period in preterm infants using speckle tracking echocardiography (STE). MATERIAL AND METHODS: Thirty-nine preterm infants ≤34 weeks' gestation underwent cardiac ultrasound evaluation during the first 96 hours of life. A repeated echocardiogram at 3 weeks of age was performed. Echocardiographic assessment involved left ventricular ejection fraction, mitral E/A ratio, S' and E' velocities, E/E' ratio, tricuspid annular plane systolic excursion (TAPSE), left atrium-to-aorta ratio, ductal diameter and ductal shunt pattern...
March 6, 2018: Echocardiography
https://www.readbyqxmd.com/read/29505405/robust-short-lag-spatial-coherence-imaging
#15
Arun Asokan Nair, Trac Duy Tran, Muyinatu A Lediju Bell
Short-lag spatial coherence (SLSC) imaging displays the spatial coherence between backscattered ultrasound echoes instead of their signal amplitudes and is more robust to noise and clutter artifacts when compared with traditional delay-and-sum (DAS) B-mode imaging. However, SLSC imaging does not consider the content of images formed with different lags, and thus does not exploit the differences in tissue texture at each short-lag value. Our proposed method improves SLSC imaging by weighting the addition of lag values (i...
March 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/29495876/polarisation-in-spin-echo-experiments-multi-point-and-lock-in-measurements
#16
Anton Tamtögl, Benjamin Davey, David J Ward, Andrew P Jardine, John Ellis, William Allison
Spin-echo instruments are typically used to measure diffusive processes and the dynamics and motion in samples on ps and ns time scales. A key aspect of the spin-echo technique is to determine the polarisation of a particle beam. We present two methods for measuring the spin polarisation in spin-echo experiments. The current method in use is based on taking a number of discrete readings. The implementation of a new method involves continuously rotating the spin and measuring its polarisation after being scattered from the sample...
February 2018: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29487679/left-atrial-strain-predicts-pro-thrombotic-state-in-patients-with-non-valvular-atrial-fibrillation
#17
Matteo Cameli, Stefano Lunghetti, Giulia Elena Mandoli, Francesca Maria Righini, Matteo Lisi, Valeria Curci, Cristina Di Tommaso, Marco Solari, Dan Nistor, Annalaura Gismondi, Marta Focardi, Roberto Favilli, Sergio Mondillo
Background and Purpose: Atrial fibrillation (AF) has a high prevalence in the population and it is responsible for up to the 25% of the strokes in elderly people. The aim of our study was to assess the correlations of left atrial (LA) functional parameter, global peak atrial longitudinal strain (PALS), derived from speckle tracking echocardiography (STE), with transesophageal echocardiography (TEE) findings in patients with persistent AF undergoing TEE before electrical cardioversion or ablation procedures...
December 2017: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/29483222/prognostic-value-of-echocardiography-in-hypertensive-versus-nonhypertensive-participants-from-the-general-population
#18
Daniel Modin, Sofie Reumert Biering-Sørensen, Rasmus Mogelvang, Nino Landler, Jan Skov Jensen, Tor Biering-Sørensen
Hypertension may be the most significant cardiovascular risk factor. Few studies have assessed the prognostic value of echocardiography in hypertensive individuals. This study examines the incremental prognostic value of adding echocardiographic parameters to established risk factors in individuals from the general population with and without hypertension. A total of 1294 individuals from the general population underwent a health examination and an echocardiogram including 2-dimensional speckle tracking. Outcome was a composite of ischemic heart disease and heart failure...
February 26, 2018: Hypertension
https://www.readbyqxmd.com/read/29453675/evaluation-of-carotid-artery-elasticity-in-patients-with-uremia-by-echo-tracking
#19
Hong Liang, Dawei Wang, Guoying Che, Yanxin Su
PURPOSE: The purpose of this study was to compare the carotid artery wall elasticity between patients with uremia and controls using echo tracking (ET). METHODS: Ninety-three patients with uremia and 35 control subjects (Group A) were enrolled in this study. In the ET mode, the carotid artery elasticity parameters including stiffness index (β), pressure-strain elasticity modulus (EP), arterial compliance (AC), and one-point pulse wave velocity (PWVβ) were measured, and carotid intima-media thickness (IMT) was measured with B-mode ultrasonography...
February 16, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/29428080/reliability-of-a-clinical-3d-freehand-ultrasound-technique-analyses-on-healthy-and-pathological-muscles
#20
Francesco Cenni, Simon-Henri Schless, Lynn Bar-On, Erwin Aertbeliën, Herman Bruyninckx, Britta Hanssen, Kaat Desloovere
BACKGROUND AND OBJECTIVE: 3D freehand Ultrasonography is a medical imaging technique that can be used to measure muscle and tendon morphological and structural properties, including volume, lengths and echo-intensity. These properties are clinically relevant in neurological disorders such as spastic cerebral palsy to monitor disease progression and evaluate the effect of treatment. This study presents a methodology for extracting these parameters along with a clinical reliability analysis for the data acquisition and processing...
March 2018: Computer Methods and Programs in Biomedicine
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