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https://www.readbyqxmd.com/read/28549736/ultrasound-strain-imaging-in-assessment-of-biceps-muscle-stiffness-and-dynamic-motion-in-healthy-adults
#1
Jing Gao, Pai-Chi Li, Johnson Chen, Wen He, Li-Juan Du, Robert Min, Michael O'Dell
We prospectively evaluated the feasibility of using ultrasound strain imaging (USI) to assess biceps brachii muscle (BBM) stiffness and dynamic motion in 10 healthy adults. The BBM axial deformation was produced by external compression with a sandbag (1.0 kg) tied onto the transducer. The BBM lateral movement was produced by manual passive elbow flexion and extension. By use of 2-D speckle tracking, captured 5-s real-time ultrasound data of BBM were processed to estimate axial strain, representing muscle stiffness, and lateral strain and tissue velocity, representing muscle dynamic motion...
May 23, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28538762/papillary-muscle-free-strain-in-patients-with-severe-degenerative-and-functional-mitral-regurgitation
#2
Alev Kılıcgedik, Gokhan Kahveci, Ahmet Seyfeddin Gurbuz, Can Yucel Karabay, Ahmet Guler, Suleyman Cagan Efe, Soe Moe Aung, Ugur Arslantas, Serdar Demir, Ibrahim Akin Izgi, Cevat Kirma
Fundamento: The role of papillary muscle function in severe mitral regurgitation with preserved and reduced left ventricular ejection fraction and the method of choice to evaluate PM have still been the subjects of controversy. Objectives: To evaluate and compare papillary muscle function in and between patients with severe degenerative and functional mitral regurgitation by using the free strain method. Methods: 64 patients with severe mitral regurgitation - 39 patients with degenerative mitral regurgitation (DMR group) and 25 patients with severe functional mitral regurgitation (FMR group) - and 30 control subjects (control group) were included in the study...
April 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28536004/multimodality-imaging-approach-in-the-diagnosis-of-chronic-myocarditis-with-preserved-left-ventricular-ejection-fraction-mcpef-the-role-of-2d-speckle-tracking-echocardiography
#3
Mario Kasner, Aleksandar Aleksandrov, Felicitas Escher, Nidal Al-Saadi, Markus Makowski, Frank Spillmann, Martin Genger, Heinz-Peter Schultheiss, Uwe Kühl, Burkert Pieske, Daniel A Morris, Michel Noutsias, Carsten Tschöpe
BACKGROUND: Up to one third of patients with chronic myocarditis (MC) have preserved left ventricular (LV) ejection fraction (MCpEF). The purpose of this study was to evaluate the role of adding 2D speckle-tracking echocardiography (STE) to cardiac magnetic resonance imaging (cMRI) in the diagnosis of patients with MCpEF. METHODS AND RESULTS: We analyzed 67 patients with suspected MCpEF who underwent endomyocardial biopsy (EMB). Thirty-two patients with confirmed chronic myocardial inflammation by EMB served as study group (MCpEF) and the remaining patients (n=35) served as control group...
May 16, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28534779/fpga-implementation-of-the-coupled-filtering-method-and-the-affine-warping-method
#4
Chen Zhang, Tianzhu Liang, Philip Mok, Weichuan Yu
In ultrasound image analysis, speckle tracking methods are widely applied to study the elasticity of body tissue. However, "feature-motion decorrelation" still remains as a challenge for speckle tracking methods. Recently, a coupled filtering method and an affine warping method were proposed to accurately estimate strain values when the tissue deformation is large. The major drawback of these methods is the high computational complexity. Even the GPU-based program requires a long time to finish the analysis...
May 17, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28514267/systolic-and-diastolic-lv-mechanics-during-and-following-resistance-exercise
#5
Eric J Stöhr, Mike Stembridge, Rob Shave, T Jake Samuel, Keeron Stone, Joseph I Esformes
PURPOSE: To improve the current understanding of the impact of resistance exercise on the heart, by examining the acute responses of left ventricular (LV) strain, twist and untwisting rate ('LV mechanics'). METHODS: LV echocardiographic images were recorded in systole and diastole before, during and immediately after (7-12 s) double leg press exercise at two intensities (30% and 60% of maximum strength, 1-repetition-maximum, 1RM). Speckle tracking analysis generated LV strain, twist and untwisting rate data...
May 16, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28511859/reference-ranges-and-regional-patterns-of-left-ventricular-strain-and-strain-rate-using-two-dimensional-speckle-tracking-echocardiography-in-a-healthy-middle-aged-black-and-white-population-the-cardia-study
#6
Henrique T Moreira, Chike C Nwabuo, Anderson C Armstrong, Satoru Kishi, Ola Gjesdal, Jared P Reis, Pamela J Schreiner, Kiang Liu, Cora E Lewis, Stephen Sidney, Samuel S Gidding, João A C Lima, Bharath Ambale-Venkatesh
BACKGROUND: Strain and strain rate are sensitive markers of left ventricular (LV) myocardial function. The aim of this study was to assess reference ranges and regional patterns of LV strain and strain rate using two-dimensional speckle-tracking echocardiography in a large population of black and white subjects. METHODS: This study involved a retrospective review of prospectively collected images in 557 participants in the Coronary Artery Risk Development in Young Adults study who remained healthy at the year 25 examination...
May 13, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28511858/reduced-myocardial-reserve-in-young-x-linked-muscular-dystrophy-mice-diagnosed-by-two-dimensional-strain-analysis-combined-with%C3%A2-stress-echocardiography
#7
Zhenzhou Li, Ying Li, Li Zhang, Xiaoying Zhang, Rebecca Sullivan, Xiaojie Ai, Christopher Szeto, Angela Cai, Longjian Liu, Weidong Xiao, Quanshui Li, Shuping Ge, Xiongwen Chen
BACKGROUND: Early, sensitive, and reproducible evaluation of left ventricular function is imperative for the diagnosis of cardiac dysfunction in patients with Duchene muscular dystrophy. The aim of this study was to test the hypothesis that combining two-dimensional strain analysis with catecholamine stress could be a sensitive method for detecting early cardiac dysfunction. METHODS: Mdx (C57BL/10ScSn-Dmdmdx/J, a mouse model of DMD) and control (C57BL/10ScSn) mice were studied with conventional M-mode and high-frequency ultrasound-based two-dimensional speckle-tracking echocardiography using long- and short-axis images of the left ventricle at baseline and after intraperitoneal isoprenaline (ISO) administration (2 μg/g body weight)...
May 13, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28502268/comparison-of-two-dimensional-and-three-dimensional-echocardiographic-strain-in-children-with-chd
#8
Bethany L Wisotzkey, Brian D Soriano, Sujatha Buddhe
BACKGROUND: In CHD, three-dimensional strain analysis may overcome limitations of Doppler and two-dimensional strain of the left ventricle. The aims of this study were to evaluate feasibility and reproducibility of three-dimensional longitudinal, circumferential, and radial systolic strain by three-dimensional speckle-tracking echocardiography compared with two-dimensional echocardiography. METHODS: Patients with CHD, biventricular circulation with a systemic left ventricle, and who had two- and three-dimensional imaging performed on the same day from 2010 to 2014 were included...
May 15, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28497844/echocardiographic-evaluation-of-right-ventricular-systolic-function-the-traditional-and-innovative-approach
#9
Dorota Smolarek, Marcin Gruchała, Wojciech Sobiczewski
Estimation of right ventricular (RV) performance still remains technically challenging due to its anatomical and functional distinctiveness. The current guidelines for the echocardiographic quantification of RV function recommend using multiple indices to describe the RV in a thorough and comprehensive manner, such as RV index of myocardial performance, tricuspid annular plane systolic excursion, fractional area change, Doppler tissue imaging-derived tricuspid lateral annular systolic velocity (S'-wave), three-dimensional RV ejection fraction (3D RVEF), longitudinal strain (RVLS)/strain rate by speckle-tracking echocardiography (STE)...
May 12, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/28492566/-speckle-tracking-echocardiography-a-practical-guide
#10
Matteo Cameli, Sergio Mondillo, Maurizio Galderisi, Giulia Elena Mandoli, Piercarlo Ballo, Stefano Nistri, Verdiana Capo, Flavio D'Ascenzi, Antonello D'Andrea, Roberta Esposito, Sabina Gallina, Roberta Montisci, Giuseppina Novo, Andrea Rossi, Donato Mele, Eustachio Agricola
Speckle tracking echocardiography (STE) has recently emerged as a quantitative technique to accurately estimate myocardial function. By the analysis of the motion of speckles in the two-dimensional ultrasonic image, this technique allows a non-Doppler angle-independent objective analysis of myocardial deformation, with the possibility to quantify thickening, shortening and rotation dynamics of cardiac function. Since this technique does not require Doppler imaging, the analysis is relatively angle-independent and is marginally affected by cardiac in-plane motion artifacts...
April 2017: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/28490697/-effect-of-left-ventricular-hypertrophy-and-deformation-on-cardiac-function-in-patients-with-uremia-cardiomyopathy-by-using-quantitative-speckle-tracking-technology
#11
Yi Zheng, Xiaohong Yang, Qiping Zhou, Yaoyao Huang, Fan Zhang, Liangyu Wang
To evaluate the effect of left ventricular hypertrophy and deformation on cardiac function in patients with uremic cardiomyopathy (UCM) by using the technology of two dimensional speckle tracking imaging (2D-STI).
 Methods: A total of 67 UCM patients were randomly divided into the normal cardiac function group (subgroup A, 32 cases) and the abnormal cardiac function group (subgroup B, 35 cases) according to the New York Heart Association points (NYHA-P). A total of 30 healthy subjetcs served as the control group...
April 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28490455/speckle-tracking-echocardiography-in-acute-lupus-myocarditis-comparison-to-conventional-echocardiography
#12
Riëtte du Toit, Phillip G Herbst, Annari van Rensburg, Hendrik W Snyman, Helmuth Reuter, Anton F Doubell
AIMS: Lupus myocarditis occurs in 5-10% of patients with systemic lupus erythematosus (SLE). No single feature is diagnostic of lupus myocarditis. Speckle tracking echocardiography (STE) can detect sub-clinical left ventricular dysfunction in SLE patients, with limited research on its utility in clinical lupus myocarditis. We report on STE in comparison to conventional echocardiography in patients with clinical lupus myocarditis. METHODS AND RESULTS: A retrospective study was done at a tertiary referral hospital in South Africa...
May 10, 2017: Echo Research and Practice
https://www.readbyqxmd.com/read/28483208/effect-of-aging-on-left-atrial-compliance-and-electromechanical-properties-in-subjects-without-structural-heart-disease
#13
Rachid Abou, Melissa Leung, Anthony M Tonsbeek, Tomaz Podlesnikar, Arie C Maan, Martin J Schalij, Nina Ajmone Marsan, Victoria Delgado, Jeroen J Bax
Aging is associated with changes in left atrial (LA) structure and function. The present study aimed at describing the effect of aging on LA properties in a large cohort of subjects without structural heart disease. We divided 386 subjects (mean age 58 years [range 16 to 91]; 188 men [49%]) clinically referred for echocardiography according to age groups. The P-wave dispersion (PWD), reflecting total atrial conduction time, was measured on a 12-lead surface electrocardiogram as the difference between maximum and minimum P-wave duration...
April 12, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28481994/risk-factors-for-the-development-of-right-ventricular-failure-after-left-ventricular-assist-device-implantation-a-single-centre-retrospective-with-focus-on-deformation-imaging%C3%A2
#14
Nadia Boegershausen, Rashad Zayat, Ali Aljalloud, Giulia Musetti, Andreas Goetzenich, Lachmandath Tewarie, Ajay Moza, Andrea Amerini, Rüdiger Autschbach, Nima Hatam
OBJECTIVES: Right heart failure (RHF) after the implantation of a left ventricular assist device (LVAD) remains a dreaded postoperative complication. Using 2D speckle-tracking echocardiography, it is possible to acquire right ventricular global and regional function. The aim of our study was to assess whether speckle-tracking echocardiography values will better predict the RHF post-continuous-flow LVAD implantation. METHODS: From January 2014 to January 2016, 54 patients who underwent LVAD implantation were included and retrospectively analysed...
May 8, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28465975/review-in-translational-cardiology-micrornas-and-myocardial-fibrosis-in-aortic-valve-stenosis-a-deep-insight-on-left-ventricular-remodeling
#15
REVIEW
Fabiani Iacopo, Conte Lorenzo, Enrico Calogero, Passiatore Matteo, Pugliese Nicola Riccardo, Santini Veronica, Barletta Valentina, Liga Riccardo, Scatena Cristian, Mazzanti Chiara Maria, Di Bello Vitantonio
MicroRNAs (miRNAs) are a huge class of noncoding RNAs that regulate protein-encoding genes (degradation/inhibition of translation). miRNAs are nowadays recognized as regulators of biological processes underneath cardiovascular disorders including hypertrophy, ischemia, arrhythmias, and valvular disease. In particular, circulating miRNAs are promising biomarkers of pathology. This review gives an overview of studies in aortic valve stenosis (AS), exclusively considering myocardial remodeling processes. We searched through literature (till September 2016), all studies and reviews involving miRNAs and AS (myocardial compartment)...
October 2016: Journal of Cardiovascular Echography
https://www.readbyqxmd.com/read/28456904/myocardial-deformation-in-iron-overload-cardiomyopathy-speckle-tracking-imaging-in-a-beta-thalassemia-major-population
#16
Luca Antonio Felice Di Odoardo, Marianna Giuditta, Elena Cassinerio, Alberto Roghi, Patrizia Pedrotti, Marco Vicenzi, Veronica Maria Sciumbata, Maria Domenica Cappellini, Alberto Pierini
Traditional echocardiography is unable to detect neither the early stages of iron overload cardiomyopathy nor myocardial iron deposition. The aim of the study is to determine myocardial systolic strain indices in thalassemia major (TM), and assess their relationship with T2*, a cardiac magnetic resonance index of the severity of cardiac iron overload. 55 TM cases with recent cardiac magnetic resonance (CMR-T2*) underwent speckle tracking analysis to assess regional myocardial strains and rotation. The results were compared with a normal control group (n = 20), and were subsequently analyzed on the basis of the CMR-T2* values...
April 29, 2017: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/28456833/relationship-between-fragmented-qrs-complexes-and-cardiac-status-in-duchenne-muscular-dystrophy-multimodal-validation-using-echocardiography-magnetic-resonance-imaging-and-holter-monitoring
#17
Min-Jung Cho, Ji-Won Lee, JeSang Lee, Yong Bum Shin, Hyoung Doo Lee
The presence of fragmented QRS is a known marker of heterogeneous ventricular activation around the myocardial scar area. We validated whether fragmented QRS shows any association with ventricular dysfunction, fibrosis, or ventricular arrhythmias in patients with Duchenne muscular dystrophy (DMD). Thirty-seven patients with DMD were evaluated using electrocardiography (ECG), echocardiography, cardiac magnetic resonance, and 24-h Holter monitoring. Associations between fragmented QRS and ventricular dysfunction, fibrosis, or ventricular arrhythmia were investigated...
April 29, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28436859/in-vivo-intracardiac-vector-velocity-imaging-using-phased-array-transducers-for-pediatric-cardiology
#18
Solveig Fadnes, Morten Wigen, Siri Ann Nyrnes, Lasse Lovstakken
Two-dimensional blood speckle tracking has shown promise for measuring complex flow patterns in neonatal hearts using linear arrays and high-frame-rate plane wave imaging. For general pediatric applications, however, the need for phased array probes emerges due to the limited intercostal acoustic window available. In this work, a clinically approved real-time duplex imaging setup with phased array probes was used to investigate the potential of blood speckle tracking for 2-D vector velocity imaging of children with congenital heart disease...
April 24, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28427411/tendon-motion-tracking-in-an-ultrasound-image-sequence-using-optical-flow-based-block-matching
#19
Bo-I Chuang, Jian-Han Hsu, Li-Chieh Kuo, I-Ming Jou, Fong-Chin Su, Yung-Nien Sun
BACKGROUND: Tendon motion, which is commonly observed using ultrasound imaging, is one of the most important features used in tendinopathy diagnosis. However, speckle noise and out-of-plane issues make the tracking process difficult. Manual tracking is usually time consuming and often yields inconsistent results between users. METHODS: To automatically track tendon motion in ultrasound images, we developed a new method that combines the advantages of optical flow and multi-kernel block matching...
April 20, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28424446/speckle-tracking-strain-imaging-practical-approach-for-application
#20
EDITORIAL
Leyla Elif Sade
No abstract text is available yet for this article.
March 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
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