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https://www.readbyqxmd.com/read/27910996/speckle-tracking-echocardiography-predicts-early-subclinical-anthracycline-cardiotoxicity-in-patients-with-breast-cancer
#1
Qi Tang, Yan Jiang, Yali Xu, Hongmei Xia
PURPOSE: This study aimed to assess the early changes of left ventricular (LV) and right ventricular (RV) mechanics associated with anthracycline treatment for breast cancer and to determine whether two-dimensional speckle tracking echocardiography (2D-STE) analysis could predict chemotherapy-induced cardiotoxicity. BACKGROUND: Anthracycline generates progressive LV dysfunction associated with a poor prognosis. Early detection of minor change of myocardial mechanics is thus important...
December 2, 2016: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/27908661/uniform-low-level-dystrophin-expression-in-the-heart-partially-preserved-cardiac-function-in-an-aged-mouse-model-of-duchenne-cardiomyopathy
#2
Nalinda B Wasala, Yongping Yue, Jenna Vance, Dongsheng Duan
Dystrophin deficiency results in Duchenne cardiomyopathy, a primary cause of death in Duchenne muscular dystrophy (DMD). Gene therapy has shown great promise in ameliorating the cardiac phenotype in mouse models of DMD. However, it is not completely clear how much dystrophin is required to treat dystrophic heart disease. We and others have shown that mosaic dystrophin expression at the wild-type level, depending on the percentage of dystrophin positive cardiomyocytes, can either delay the onset of or fully prevent cardiomyopathy in dystrophin-null mdx mice...
November 28, 2016: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/27903535/magnetic-resonance-imaging-of-cardiac-strain-pattern-following-transplantation-of-human-tissue-engineered-heart-muscles
#3
Xulei Qin, Johannes Riegler, Malte Tiburcy, Xin Zhao, Tony Chour, Babacar Ndoye, Michael Nguyen, Jackson Adams, Mohamed Ameen, Thomas S Denney, Phillip C Yang, Patricia Nguyen, Wolfram H Zimmermann, Joseph C Wu
BACKGROUND: The use of tissue engineering approaches in combination with exogenously produced cardiomyocytes offers the potential to restore contractile function after myocardial injury. However, current techniques assessing changes in global cardiac performance after such treatments are plagued by relatively low detection ability. Since the treatment is locally performed, this detection could be improved by myocardial strain imaging that measures regional contractility. METHODS AND RESULTS: Tissue engineered heart muscles (EHMs) were generated by casting human embryonic stem cell-derived cardiomyocytes with collagen in preformed molds...
November 2016: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27894062/echocardiographic-comparison-between-left-ventricular-non-compaction-and-hypertrophic-cardiomyopathy
#4
Trine F Haland, Jørg Saberniak, Ida S Leren, Thor Edvardsen, Kristina H Haugaa
BACKGROUND: Modern imaging technology has improved detection of left ventricular non-compaction cardiomyopathy (LVNC). Hypertrophic cardiomyopathy (HCM) shares morphological features with LVNC, but prognosis and treatment strategies differ between LVNC and HCM. METHODS AND RESULTS: We aimed to compare global and regional LV myocardial function in LVNC and HCM. We hypothesized that apical function is reduced in LVNC due to the embryonic reduced compaction of the apex...
November 9, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27893992/prediction-of-myocardial-infarction-by-assessing-regional-cardiac-wall-in-cmr-images-through-active-mesh-modeling
#5
Hossein Yousefi-Banaem, Saeed Kermani, Sasan Asiaei, Hamid Sanei
Myocardial infarction is a leading cause of morbidity and mortality. In this study, using Cine MRI images, the infarct region was precisely determined by examining the local migration path length of critical points on myocardium borders and the fractional thickening effects. First, MRI Cine images of Epi/Endocardium were processed in 3D for all slices, and then incorporated in all frames to build a dynamic model. Epi/Endocardium images were segmented using Heiberg algorithm, and then by a robust restricted block matching algorithm, the sparse points were tracked...
November 14, 2016: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/27891719/myocardial-strain-to-detect-subtle-left-ventricular-systolic-dysfunction
#6
REVIEW
Laurens F Tops, Victoria Delgado, Nina Ajmone Marsan, Jeroen J Bax
In daily clinical practice, LV systolic function is routinely assessed with the use of two-dimensional echocardiography. Using biplane LV end-diastolic and end-systolic volumes, LVEF is calculated. The introduction of real-time three-dimensional echocardiography has improved the accuracy of echocardiographic assessment of LVEF. However, calculated LVEF may not truly represent LV systolic function in specific cardiac diseases or when subtle LV dysfunction is present. Two-dimensional speckle tracking echocardiography enables assessment of myocardial strain, thereby providing detailed information on global and regional LV deformation...
November 27, 2016: European Journal of Heart Failure
https://www.readbyqxmd.com/read/27889396/functional-recovery-of-regional-myocardial-deformation-in-patients-with-takotsubo-cardiomyopathy
#7
Sung-Ai Kim, Sang-Ho Jo, Kyoung-Ha Park, Hyun-Sook Kim, Sang-Jin Han, Woo-Jung Park
BACKGROUND: Takotsubo cardiomyopathy (TC) is acute, but completely reversible in the absence of significant coronary artery disease. This study aims to assess the functional recovery of regional myocardial deformation in patients with TC using 2-dimensional (2D) speckle tracking echocardiography. METHODS: Thirty-three patients diagnosed with TC (mean age 63 years, 26 female) prospectively underwent serial 2D echocardiography on day 1 (initial presentation), day 4 [the middle, interquartile range (IQR), 2-5 days], and day 21 (recovery, IQR 13-32 days)...
November 23, 2016: Journal of Cardiology
https://www.readbyqxmd.com/read/27886611/inter-and-intraobserver-consistency-in-lv-myocardial-strain-measurement-using-a-novel-multi-layer-technique-in-patients-with-severe-aortic-stenosis-and-preserved-lv-ejection-fraction
#8
Koya Ozawa, Nobusada Funabashi, Tomoko Kamata, Yoshio Kobayashi
BACKGROUND: A new transthoracic echocardiography (TTE) technique allows multi-layer measurement of left ventricular (LV), endocardial, epicardial, and whole layer myocardial strain. We evaluated interobserver and intraobserver TTE reproducibility for 2D LV global longitudinal (GLS) and circumferential strain (GCS) estimates using data from severe aortic stenosis (AS) subjects with preserved LV ejection fraction (EF). METHODS: Twenty severe AS subjects (11 male; mean age, 75±7years; LV EF >50%) underwent TTE (Vivid E9, GE Healthcare)...
November 9, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27883973/left-ventricular-adaptation-after-tavi-evaluated-by-conventional-and-speckle-tracking-echocardiography
#9
Zisis Dimitriadis, Smita Scholtz, Stephan Ensminger, Marcus Wiemer, Thomas Fischbach, Werner Scholtz, Cornelia Piper, Jochen Börgermann, Thomas Bitter, Dieter Horstkotte, Lothar Faber
OBJECTIVE: Our study aimed to evaluate myocardial adaption and outcome after transfemoral aortic valve implantation (TAVI TF) for severe aortic stenosis by LV ejection fraction (LVEF) and speckle tracking analysis. METHODS AND RESULTS: From 168 patients who underwent TAVI TF between 2010 and 2013 in our institution, n=95 with a follow-up period ≥3months were included and grouped (G) according to baseline left ventricular ejection fraction (LVEF; G1: LVEF<40%, G2: 40%-55%, G3: >55%)...
November 9, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27880739/estimation-of-cardiac-motion-in-cine-mri-sequences-by-correlation-transform-optical-flow-of-monogenic-features-distance
#10
Bin Gao, Wanyu Liu, Liang Wang, Zhengjun Liu, Pierre Croisille, Philippe Delachartre, Patrick Clarysse
Cine-MRI is widely used for the analysis of cardiac function in clinical routine, because of its high soft tissue contrast and relatively short acquisition time in comparison with other cardiac MRI techniques. The gray level distribution in cardiac cine-MRI is relatively homogenous within the myocardium, and can therefore make motion quantification difficult. To ensure that the motion estimation problem is well posed, more image features have to be considered. This work is inspired by a method previously developed for color image processing...
December 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27878699/differentiation-of-light-chain-cardiac-amyloidosis-from-hypertrophic-cardiomyopathy-using-myocardial-mechanical-parameters-by-velocity-vector-imaging-echocardiography
#11
Lu Zhang, Xiao Zhou, Jing Wang, Yang Mu, Bohan Liu, Wenqing Lv, Ye Wang, Hongwei Liu, Hongbin Liu, Guang Zhi
We aimed to evaluate the diagnostic efficacy of layered velocity vector imaging (VVI)-derived left ventricular (LV) mechanical parameters in the differential diagnosis of primary light-chain cardiac amyloidosis (AL-CA) and hypertrophic cardiomyopathy (HCM). We recruited 35 subjects with histologically-diagnosed AL-CA, 35 subjects with HCM, and 30 age-matched healthy controls. We used conventional echocardiography and electrocardiogram to evaluate general heart function and electrophysiology properties. Furthermore, we applied two-dimensional VVI echocardiography to assess the layered mechanical parameters during systole, including endocardial and epicardial longitudinal strain (ENDO and EPI LSsys), circumferential strain (CSsys), radial strain (RSsys), rotation (ROT) and twist (TWI), in different LV walls and levels...
November 23, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/27876412/advanced-symptoms-are-associated-with-myocardial-damage-in-patients-with-severe-aortic-stenosis
#12
Ricardo A Spampinato, Manuela Tasca, Michael A Borger, Valerie Schloma, Yaroslava Dmitrieva, Meinhard Mende, Thilo Noack, Elfriede Strotdrees, Friedrich-W Mohr
BACKGROUND: Once aortic stenosis (AS) is severe, patients develop symptoms at different stages. Indeed, symptom status may correlate poorly with the grade of valve narrowing. Multiple pathophysiological mechanisms, other than valvular load, may explain the link between AS and symptom severity. We aimed to describe the relationship between the severity of symptoms and the characteristics of a cohort of patients with severe AS already referred for aortic valve replacement (AVR). METHODS: We analyzed 118 consecutive patients (70±9 years, 55% men) with severe AS referred for AVR...
November 19, 2016: Journal of Cardiology
https://www.readbyqxmd.com/read/27876281/post-transplant-surveillance-for-acute-rejection-and-allograft-vasculopathy-by-echocardiography-usefulness-of-myocardial-velocity-and-deformation-imaging
#13
Michael Dandel, Roland Hetzer
Diagnosing and monitoring acute rejection (AR) and cardiac allograft vasculopathy (CAV) is essential for graft and transplant patient survival and, consequently, a major objective for heart transplant patient surveillance. Because functionally relevant CAV can arise and progress without clinical symptoms and sub-clinical ARs can facilitate the development of CAV, standard surveillance of AR and CAV includes routine endomyocardial biopsy (EMB) and coronary angiography (CA) screenings at pre-defined time intervals...
October 7, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/27874107/the-effect-of-oral-consumption-of-probiotics-in-prevention-of-heart-injury-in-a-rat-myocardial-infarction-model-a-histopathological-hemodynamic-and-biochemical-evaluation
#14
Jafar Sadeghzadeh, Abedin Vakili, Hamid Reza Sameni, Mahdi Shadnoush, Ahmad-Reza Bandegi, Mahdi Zahedi Khorasani
BACKGROUND: Despite the emerging evidence on beneficial effects of probiotics on the cardiovascular system, their impact on the management of ischemic heart diseases and its possible mechanism have not been elucidated. METHODS: Four viable probiotics bacterial strains, including Bifidobacterium breve, Lactobacillus casei, Lactobacillus bulgaricus and Lactobacillus acidophilus, at the concentrations of 2×106 colony-forming units/ml were orally administered to the rats daily for 14 days before the induction of infarct-like myocardial injury using isoproterenol...
November 22, 2016: Iranian Biomedical Journal
https://www.readbyqxmd.com/read/27872444/myocardial-strain-imaging-and-malignant-ventricular-arrhythmia-risk
#15
EDITORIAL
Mariana Floria, Catalina Arsenescu-Georgescu
No abstract text is available yet for this article.
November 2016: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/27865184/changes-of-left-ventricular-mechanics-after-trans-catheter-aortic-valve-implantation-and-surgical-aortic-valve-replacement-for-severe-aortic-stenosis-a-tissue-tracking-cardiac-magnetic-resonance-study
#16
Gaetano Nucifora, John-Paul Tantiongco, Gareth Crouch, Jayme Bennetts, Ajay Sinhal, Phillip J Tully, Craig Bradbrook, Robert A Baker, Joseph B Selvanayagam
BACKGROUND: Left ventricular (LV) mechanics are impaired in patients with severe aortic stenosis (AS). The aim of the present study was to assess their changes early and late after trans-catheter aortic valve implantation (TAVI) and surgical aortic valve replacement (AVR) using cardiac magnetic resonance (CMR) tissue-tracking imaging. METHODS: In 59 patients with severe AS undergoing either TAVI (n=35) or surgical AVR (n=24), CMR with late gadolinium enhancement (LGE) imaging was performed before and early post-procedure to evaluate LV function and mass, and presence/extent of LGE...
November 9, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27862239/quantitative-echocardiographic-measures-in-the-assessment-of-single-ventricle-function-post-fontan-incorporation-into-routine-clinical-practice
#17
Rodrigo Rios, Salil Ginde, David Saudek, Rohit S Loomba, Jessica Stelter, Peter Frommelt
BACKGROUND: Quantitative echocardiographic measurements of single ventricular (SV) function have not been incorporated into routine clinical practice. METHODS: A clinical protocol, which included quantitative measurements of SV deformation (global circumferential and longitudinal strain and strain rate), standard deviation of time to peak systolic strain, myocardial performance index (MPI), dP/dT from an atrioventricular valve regurgitant jet, and superior mesenteric artery resistance index, was instituted for all patients with a history of Fontan procedure undergoing echocardiography...
November 16, 2016: Echocardiography
https://www.readbyqxmd.com/read/27861208/left-ventricular-myocardial-fibrosis-atrophy-and-impaired-contractility-in-patients-with-pulmonary-arterial-hypertension-and-a-preserved-left-ventricular-function-a-cardiac-magnetic-resonance-study
#18
Rami Homsi, Julian A Luetkens, Dirk Skowasch, Carmen Pizarro, Alois M Sprinkart, Juergen Gieseke, Julia Meyer Zur Heide Gen Meyer-Arend, Hans H Schild, Claas P Naehle
PURPOSE: Using a cardiac magnetic resonance (CMR) approach we investigated left ventricular (LV) myocardial changes associated with pulmonary arterial hypertension (PAH) by strain analysis and mapping techniques. MATERIALS AND METHODS: Seventeen patients with PAH (9 men; mean age, 64.2±13.6 y) and 20 controls (10 men, 63.2±10.5 y) were examined using CMR at 1.5 T. Native LV T1-relaxation times (T1) and extracellular volume fraction (ECV) were assessed using a MOLLI sequence, T2-relaxation times (T2) by means of a gradient spin-echo sequence, and LV longitudinal strain (LVS) and right ventricular (RV) longitudinal strain (RVS) by means of CMR feature tracking...
November 16, 2016: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/27858918/global-longitudinal-strain-predicts-incident-atrial-fibrillation-and-stroke-occurrence-after-acute-myocardial-infarction
#19
Flemming Javier Olsen, Sune Pedersen, Jan Skov Jensen, Tor Biering-Sørensen
Patients with acute myocardial infarction are at increased risk of developing atrial fibrillation. We aimed to evaluate whether speckle tracking echocardiography improves risk stratification for atrial fibrillation in these patients.The study comprised of 373 patients with ST-segment elevation myocardial infarction (STEMI) treated with primary percutaneous coronary intervention. Patients had an echocardiogram performed at a median of 2 days after their STEMI. The echocardiograms consisted of conventional measurements and myocardial strain analysis by speckle tracking from 3 apical projections...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27858884/layer-specific-quantification-of-myocardial-deformation-in-sepsis-induced-takotsubo-cardiomyopathy-three-case-reports-of-a-serial-2-dimensional-speckle-tracking-echocardiographic-study
#20
Ming-Jui Hung, Yu-Cheng Kao, Wei-Siang Chen, Chun-Tai Mao, Tien-Hsing Chen, Ning-I Yang, Ta Ko, Chung-Yu Liang
INTRODUCTION: Little is known about the time-course changes in left ventricular myocardial deformation in patients with Takotsubo cardiomyopathy (TC) using layer-specific quantification of myocardial deformation assessed by 2-dimensional speckle tracking echocardiography (2DSTE). CASE SUMMARY: In this retrospective 2DSTE follow-up study of 3 female patients with sepsis-induced TC, we examined changes in strain among the 3 myocardial layers, and examined the changes in left ventricular diastolic function and right ventricular systolic function...
November 2016: Medicine (Baltimore)
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