Relevant bibliographies by topics / Speckle tracking echocardiography / Dissertations / Theses
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Dissertations / Theses on the topic 'Speckle tracking echocardiography'

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Published: 4 June 2021
Last updated: 26 July 2025

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1

Spalla, I. "SPECKLE-TRACKING ECHOCARDIOGRAPHY IN DOGS WITH PATENT DUCTUS ARTERIOSUS." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/233990.

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PDA is one of the most common congenital cardiac malformation in the dog. Echocardiography has been the cornerstone in diagnosing and providing hemodynamic information in a wide variety of disease.Recently, speckle tracking echocardiography has been regarded as a useful tool to assess cardiac function. Aim of the study was to compare cardiovascular hemodynamics in dogs with PDA with healthy control dogs and evaluate any change in cardiac contractility before and after PDA closure. A statistically significant difference was found between standard and advanced echocardiographic techniques, with
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2

Trivedi, Siddharth Jagdish. "Clinical utility of speckle tracking echocardiography in the assessment of cardiovascular disease." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/25705.

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Left ventricular (LV) ejection fraction (EF) derived from two-dimensional echocardiography has been the cornerstone for LV function assessment for more than half a century. However, EF is only an indirect measure of cardiac output obtained from changes in LV volume, and does not necessarily reflect intrinsic myocardial contractile properties. Furthermore, LVEF measurement has a number of challenges that relate to image quality, LV geometry assumptions, and technical expertise, and has significant issues with intra-observer, inter-observer, and test-retest variability. A more contemporary marke
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Geenty, Paul. "Echocardiography in Infiltrative Cardiomyopathy: Amyloidosis and Fabry Disease." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/29152.

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The infiltrative cardiomyopathies are a heterogeneous group of disorders classically characterised by increased wall thickness and progressive diastolic dysfunction. While considered relatively rare, they are likely underdiagnosed, and are increasingly recognized as a significant cause of heart failure with preserved ejection fraction, particularly in the case of amyloidosis. Despite varying markedly in their natural histories and treatments available, they are often difficult to distinguish using conventional echocardiographic techniques. For this reason, novel imaging techniques, and multi-m
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4

Trache, Marian Tudor. "The agreement between 3D, standard 2D and triplane 2D speckle tracking: effects of image quality and 3D volume rate." Doctoral thesis, Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-202530.

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Die technologische Entwicklung im Bereich der Echokardiographie hat in der letzten Dekade neue Methoden zur objektiven Erfassung der regionalen linksventrikulären Wandbewegung ermöglicht. Speckle Tracking erfasst die myokardiale Deformation durch die Positionsänderung einzelner Bildpunkte von einem Bild des analysierten Datensatzes zum nächsten. Diese Methode ist dem Gewebedoppler überlegen, insbesondere wegen ihrer Unabhängigkeit vom Anlotungswinkel. Zwei-dimensionale (2D) Speckle Tracking Analysen wurden für die klinische Praxis validiert. Die drei-dimensionale (3D) Echokardiographie erlaubt
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Orde, Sam. "Use of advanced echocardiography imaging techniques in the critically ill." Thesis, The University of Sydney, 2019. https://hdl.handle.net/2123/21623.

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Background: Critical care echocardiography has become standard of care in the ICU. New technologies have been developed and have shown potential clinical utility to elucidate myocardial dysfunction not seen with conventional imaging. We sought to determine the feasibility and potential clinical benefit of these techniques in common situations seen in the ICU. Hypothesis: Advanced echo techniques would be feasible in the majority of critically ill patients and have prognostic significance, clinical utility and diagnose cardiac abnormalities, potentially in a more sensitive manner than conventio
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6

Réant, Patricia. "Analyse échocardiographique des déformations myocardiques en speckle tracking." Thesis, Bordeaux 2, 2009. http://www.theses.fr/2009BOR21662/document.

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L’analyse de la fonction systolique en échocardiographie représente un challenge majeur depuis une vingtaine d’années dans le but d’améliorer la détection et la quantification des anomalies de la contraction myocardique. L’analyse des déformations myocardiques consiste à étudier le pourcentage d’étirement ou de raccourcissement myocardiques au cours du cycle cardiaque. Après le grand pas en avant dans ce domaine, consécutif à l’avènement du Doppler tissulaire il y a un quinzaine d’années, ces 4 dernières années ont vu naître une nouvelle technique d’analyse bidimensionnelle des déformations, p
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7

Odudu, Aghogho. "Characterising haemodialysis-associated cardiomyopathy using deformation imaging by cardiovascular magnetic resonance tagging and speckle-tracking echocardiography." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13790/.

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Haemodialysis patients represent an extreme phenotype of cardiovascular risk with a pattern of disease distinct from that in the general population. Non-traditional risk factors, specific to chronic kidney disease such as hypervolaemia, arterial stiffness and advanced glycation end-product deposition are increasingly recognised. A previously demonstrated non-traditional risk factor associated with worse outcomes is the presence of uraemic cardiomyopathy. This pattern of cardiac morphology and function has previously been defined as the presence of left ventricular abnormalities, including left
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8

Marinho, Fabrício Andrade. "Avaliação miocárdica por speckle tracking bidimensional em coelhos sob diferentes modalidades ventilatórias. /." Jaboticabal, 2017. http://hdl.handle.net/11449/190852.

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Orientador: Aparecido Antonio Camacho<br>Resumo: O objetivo do presente estudo foi investigar a função miocárdica pela técnica de ecocardiografia bidimensional speckle tracking (2D STE) em pacientes submetidos à procedimentos anestésico prolongado, com a intenção de se detectar possível disfunção sistólica. Inicialmente para se determinar o intervalo normal da função sistólica na espécie, foram utilizados 31 coelhos da raça Nova Zelândia, adultos, hígidos, machos, com peso médio de 4,0 ± 0,53 kg, nos quais foram obtidos os índices sistólicos radiais como, velocidade rotacional e radial, desloc
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9

Fenerich, Michelli. "Avaliação ecocardiográfica da função do ventrículo direito de cães da raça Boxer com cardiomiopatia arritmogênica do ventrículo direito : estudo caso-controle /." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/154062.

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Submitted by Michelli Fenerich (michellifenerich@hotmail.com) on 2018-05-18T01:53:19Z No. of bitstreams: 1 Dissertação Michelli Fenerich FINAL.pdf: 780509 bytes, checksum: 243c644a7b86cf6eae0f835b726c9dea (MD5)<br>Rejected by Alexandra Maria Donadon Lusser Segali null (alexmar@fcav.unesp.br), reason: Solicitamos que realize correções na submissão seguindo as orientações abaixo: O arquivo PDF submetido ao repositório deve conter o certificado de aprovação (documento obrigatório), favor inserir o mesmo no arquivo PDF e fazer novamente a submissão. Agradecemos a compreensão. on 2018-05-22
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10

Amundsen, Brage Høyem. "Myocardial function quantified by speckle tracking and tissue Doppler echocardiography – Validation and application in exercise testing and training." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for sirkulasjon og bildediagnostikk, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2157.

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11

Stewart, Glenn Malcolm. "Cardiac Responses to Endurance Exercise: Novel Insights from Exercise Speckle-Tracking Echocardiography and High-Sensitivity Cardiac Troponin Assays." Thesis, Griffith University, 2016. http://hdl.handle.net/10072/368160.

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Endurance exercise training stimulates numerous adaptive changes to the structure, morphology and function of the human heart. Recent evidence suggests that a prolonged and strenuous bout of exercise, such as an ultra-endurance marathon or triathlon event, may results in temporary autonomic, biochemical and functional abnormalities which predominantly arise in the right ventricle. The impact of routine day-to-day endurance exercise training on exercise-induced cardiac disturbances is less clear, but likely influenced by hemodynamic, hormonal and metabolic factors that are related to the exerci
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12

Altman, Mikhail. "Déformation myocardique et remodelage cardiaque." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST0056.

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Le remodelage myocardique est une réponse du myocarde à une altération des contraintes pariétales générée par une agression aiguë (ischémie myocardique) ou chronique (surcharge en pression, surcharge en volume, anomalie métabolique). En effet, le cœur est un organe capable de modifier en fonction de ses conditions de travail l’expression de ses fonctions moléculaires et cellulaires pour aboutir à des changements de taille,de morphologie et de fonction. Le remodelage myocardique est un mécanisme adaptatif initialement bénéfique, car en modifiant sa géométrie, le ventricule gauche s’adapte aux m
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13

Arvidsson, Sandra. "Cardiac function in hereditary transthyretin amyloidosis : an echocardiographic study." Doctoral thesis, Umeå universitet, Institutionen för folkhälsa och klinisk medicin, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-113891.

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Background: Hereditary transthyretin amyloidosis (ATTR) is a lethal disease in which misfolded transthyretin (TTR) proteins accumulate as insoluble aggregates in tissues throughout the body. A common mutation is the exchange of valine to methionine at place 30 (TTR V30M), a form endemically found in the northern parts of Sweden. The main treatment option for ATTR amyloidosis is liver transplantation as the procedure halts production of mutated transthyretin. The disease is associated with marked phenotypic diversity ranging from predominant cardiac complications to pure neuropathy. Two differe
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14

Joos, Philippe. "Imagerie ultrasonore ultra-rapide dédiée à la quantification 3D du mouvement cardiaque." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1312/document.

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Cette thèse porte sur le développement et l’évaluation de techniques d’imagerie en échocardiographie. L’objectif est de proposer des méthodes d’imagerie ultrasonore ultrarapide pour estimer le mouvement cardiaque 2-D et 3-D.Première modalité d’imagerie du cœur, l’échocardiographie conventionnelle permet la mesure des déformations myocardiques à 80 images/s. Cette cadence d’imagerie est insuffisante pour quantifier les mouvements de la totalité du myocarde lors de tests d’efforts, utiles en évaluation clinique, au cours desquels le rythme cardiaque est augmenté. De plus, la résolution temporell
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15

Ramzy, Guirguis Ihab. "Insights into the effect of myocardial revascularisation on electrical and mechanical cardiac function." Doctoral thesis, Umeå universitet, Institutionen för folkhälsa och klinisk medicin, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-54674.

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Background: Acute coronary syndrome is known for its effect on cardiac function and can lead to impaired segmental and even global myocardial function. Evidence exists that myocardial revascularisation whether pharmacological, interventional or surgical results in improvement of systolic and diastolic left ventricular (LV) function, particularly that of the long axis which represents the sub-endocardial function, known as the most sensitive layer to ischaemia. Objective: We sought to gain more insight into the early effect of pharmacological and interventional myocardial revascularisation on v
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16

Segun, Utomi Victor. "The 'athletic heart' : insights from modern imaging tools in Caucasian and West African athletes." Thesis, Liverpool John Moores University, 2015. http://researchonline.ljmu.ac.uk/4557/.

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A seminal study by Morganroth et al (1975) demonstrated a differential pattern of cardiac adaptation with prolonged exercise training; of eccentric pattern of left ventricular hypertrophy (LVH) in endurance trained athletes (ET) and concentric LVH in resistance trained athletes (RT). Specific inconsistencies related to the nature of any adaptation to RT; the value of new imaging technologies; the relative importance of scaling of cardiac data for differences in body size; the impact of training on the right ventricle (RV) and the fit of differential pattern of adaptation in athletes with Black
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17

CORONA, MARTA. "Valutazione della funzione cardiaca nei pazienti affetti da Atassia di Friedreich: studio con Tissue Doppler Imaging e Speckle Tracking Echocardiography." Doctoral thesis, Università degli Studi di Cagliari, 2016. http://hdl.handle.net/11584/266689.

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Background. Friedreich ataxia (FRDA) is an autosomal recessive degenerative disease characterized by progressive gait and limb ataxia, hypertrophic cardiomyopathy, diabetes and sensory neuropathy. Large GAA repeat expansions in the first intron of the frataxin gene are the most common mutation underlying FRDA. This mutation results in intramitochondrial iron accumulation and oxidative stress increase. FRDA is associated with progressive cardiac hypertrophy; however, subclinical left ventricular (LV) dysfunction may occur in FRDA patients in spite of normal LV ejection fraction (LVEF) and
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18

Castro, ClÃudio CÃsar Monteiro de. "AvaliaÃÃo da funÃÃo miocÃrdica de pacientes com sÃndrome mielodisplÃsica pelo ecocardiograma convencional com doppler e pelas novas tÃcnicas de doppler tecidual e speckle-tracking." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7902.

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A SÃndrome MielodisplÃsica à uma hemopatia clonal de alta prevalÃncia em idosos Anemia à uma caracterÃstica marcante dessa doenÃa Pacientes com dependÃncia de suporte transfusional tem pior prognÃstico Depois das complicaÃÃes relacionadas à prÃpria doenÃa as complicaÃÃes cardiovasculares sÃo a principal causa de morte Novas tÃcnicas ecocardiogrÃficas como o Doppler tecidual e speckle-tracking podem ser Ãteis na anÃlise da funÃÃo cardÃaca nesse grupo Neste estudo foi avaliado um grupo de 34 pacientes e 14 controles saudÃveis emparelhados por sexo e idade sendo submetido à ecocardiograma convenc
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Braga, João Carlos Moron Saes. "Avaliação da função sistólica biventricular pelo speckle tracking em pacientes com anemia falciforme." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/98/98131/tde-16032015-085704/.

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Introdução: A doença falciforme (DF) é a afecção hematológica hereditária de maior prevalência no mundo, sendo que a anemia falciforme (AF) é a forma mais grave com elevada morbidade e mortalidade. Alterações cardíacas são reconhecidamente associadas à AF, como aumento cavitário, hipertensão arterial pulmonar e disfunção diastólica do ventrículo esquerdo. No entanto, ainda não existe consenso quanto à função sistólica ventricular nesses pacientes. O objetivo deste estudo foi o de investigar a função ventricular de pacientes com anemia falciforme utilizando o strain e o twist ventricular obtido
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20

Calcutteea, Avin. "New insights in the assessment of right ventricular function : an echocardiographic study." Doctoral thesis, Umeå universitet, Medicin, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-66725.

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Background:  The right ventricle (RV) is multi-compartmental in orientation with a complex structural geometry. However, assessment of this part of the heart has remained an elusive clinical challenge. As a matter of fact, its importance has been underestimated in the past, especially its role as a determinant of cardiac symptoms, exercise capacity in chronic heart failure and survival in patients with valvular disease of the left heart. Evidence also exists that pulmonary hypertension (PH) affects primarily the right ventricular function. On the other hand, previous literature suggested that
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Petersson, Ida. "En jämförelsestudie mellan manuell, semiautomatisk och automatisk utlinjering av endokardiet vid bedömning av ejektionsfraktionen." Thesis, Örebro universitet, Institutionen för hälsovetenskaper, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-84609.

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Introduktion: Vid ekokardiografi används ultraljudsvågor med frekvens över 20 000Hz. Ultraljudssändare med piezoelektriska kristaller används för att generera ljudvågor som skickas ut i kroppen, reflekteras och sedan återvänder till kristallerna för att skapa en ultraljudsbild. Ejektionsfraktionen uttrycker hur stor del av den diastoliska volymen som pumpas ut i kroppen under systole och är en viktig parameter vid bedömning av den globala systoliska funktionen. Den rekommenderade metoden Simpsons biplan jämförs med Philips automatiska funktion a2Dq, som utgår ifrån speckle tracking principen,
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Lima, Márcio Silva Miguel. "Estudo da dinâmica de contração do ventrículo esquerdo pela técnica de speckle tracking em doença de Chagas." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/5/5131/tde-07032014-152500/.

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INTRODUÇÃO: A doença de Chagas tem uma alta prevalência no Brasil e América Latina. Dentre as miocardiopatias (MCP), é a que evolui com pior prognóstico. A identificação precoce de disfunção sistólica de uma MCP é fundamental para o início do tratamento, assim como sua definição etiológica, sendo o ecocardiograma um dos métodos diagnósticos mais importantes na prática clínica. No entanto, mesmo que a análise da função sistólica global do ventrículo esquerdo (VE) demonstre fração de ejeção preservada, é possível já estar ocorrendo alguma anormalidade contrátil, não detectada pelos exames de rot
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23

Muraru, Denisa. "Exploring the Clinical Feasibility and Reliability of Three-Dimensional Echocardiography for Advanced Quantitative Analysis of Left Ventricular Myocardial Deformation." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423662.

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Background. Assessment of left ventricular (LV) function is a fundamental part of clinical cardiology, holding important diagnostic, prognostic and management implications. The most important advance in LV quantification over the last decade was the development of techniques aimed to quantify tissue motion and deformation from ultrasound images, such as tissue Doppler imaging (DTI) and two-dimensional speckle-tracking echocardiography (2DSTE). More recently, speckle-tracking algorithms have been applied to three-dimensional (3D) volumetric acquisitions of the LV (i.e. referred to as 3D speckl
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24

Ribeiro, Fernando Fonseca França. "Avaliação da deformação miocárdica do ventrí­culo esquerdo pela técnica ecocardiográfica de speckle tracking em um modelo experimental animal de doença de Chagas." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/17/17138/tde-18072018-163515/.

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Ferramentas diagnósticas capazes de detectar envolvimento cardíaco precoce na doença de Chagas são necessárias. A técnica ecocardiográfica de rastreamento de pontos, ou speckle tracking echocardiography (STE) oferece condições para o diagnóstico precoce de lesão cardíaca por avaliar a deformação miocárdica (strain). O objetivo do estudo foi avaliar as alterações sequenciais de parâmetros estruturais e funcionais dos ventrículos na evolução da doença. Um total de 37 hamsters fêmeas (Mesocricetus auratus) adultas receberam, por via intraperitoneal, 35.000 formas tripomastigotas de Trypanosoma cr
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Peluso, Diletta. "Advanced Echocardiographic Evaluation of Right Ventricular Function in Patients with Pulmonary Hypertension." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3421780.

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Background: the right ventricle (RV) is a complex shaped cardiac chamber, whose pump function is mainly driven by a longitudinal deformation, as showed by anatomical studies. Conventional echocardiography showed several limitations in the analysis of RV size and function. RV systolic dysfunction is an important prognostic factor in several pathological condition, among which pulmonary hypertension (PH). However, the progression of RV mechanical changes that lead to the RV pump function impairment remains to be clarified. The new echocardiographic techniques, two dimensional-speckle tracking (2
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Junior, Antonio Amador Calvilho. "Correlação entre medidas ecocardiográfica e invasiva da pressão diastólica final do ventrículo esquerdo em coronariopatas com fração de ejeção preservada." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/98/98131/tde-13072016-091349/.

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A doença arterial coronária é importante e prevalente manifestação da aterosclerose. A avaliação da função diastólica pelos parâmetros mitrais obtidos com Doppler ecocardiográfico possui limitações nos coronariopatas com fração de ejeção do ventrículo esquerdo (FEVE) preservada. Nestes, a disfunção diastólica, independentemente da FEVE, associa-se a maior incidência de desfechos desfavoráveis. A elevação da pressão diastólica final (PD2) do ventrículo esquerdo (VE) é a principal consequência fisiológica da disfunção diastólica. A pesquisa por melhores formas de determinação da PD2 do VE esten
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Campbell, Timothy. "Methods for Arrhythmogenic Substrate Identification and Procedural Improvements for Ventricular Arrhythmias." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29925.

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Ventricular arrhythmias (VA) are a frequent precursor to sudden cardiac death (SCD) in patients with structural heart disease (SHD). Patients with SHD are at risk of recurrent ventricular tachycardia (VT), which generally occurs due to re-entry within and around the presence of an arrhythmogenic scar. Therefore, scarred myocardium forms the necessary substrate for arrhythmogenesis to occur. A scar may occur due to obstructive coronary artery disease, causing ischaemic cardiomyopathy (ICM), or from cardiac injury due to several other causes, including inflammatory, infiltrative, toxin-medi
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Zhao, Ying. "Effect of valve replacement for aortic stenosis on ventricular function." Doctoral thesis, Umeå universitet, Institutionen för folkhälsa och klinisk medicin, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-46809.

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Background：Aortic stenosis (AS) is the commonest valve disease in the West. Aortic valve replacement (AVR) remains the only available management for AS and results in improved symptoms and recovery of ventricular functions. In addition, it is well known that AVR results in disruption of LV function mainly in the form of reversal of septal motion as well as depression of right ventricular (RV) systolic function. The aim of this thesis was to study, in detail, the early and mid-term response of ventricular function to AVR procedures (surgical and TAVI) as well as post operative patients’ exercis
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Leal, Gabriela Nunes. "Estudo ecocardiográfico da função ventricular esquerda em pacientes com lúpus eritematoso sistêmico juvenil através da técnica de Speckle-Tracking bidimensional." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/5/5141/tde-20062016-102845/.

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Objetivo: O principal propósito do estudo foi pesquisar a disfunção ventricular esquerda subclínica em pacientes com lúpus eritematoso sistêmico juvenil (LESJ) através da técnica de speckle-tracking bidimensional. Foi investigada ainda uma possível correlação entre o comprometimento da deformação miocárdica e o SLEDAI-2K (Systemic Lupus Erithematosus Disease Activity Index 2000), bem como a presença de fatores de risco cardiovascular, tanto tradicionais como ligados à doença. Métodos: 50 pacientes assintomáticos do ponto de vista cardiovascular e 50 controles saudáveis (14,74 vs. 14,82 anos, p
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Macedo, Carolina Thé. "Avaliação da acurácia do strain pelo speckle tracking para detecção de fibrose miocárdica na ressonância magnética em portadores de doença de Chagas." reponame:Repositório Institucional da FIOCRUZ, 2015. https://www.arca.fiocruz.br/handle/icict/12691.

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Submitted by Ana Maria Fiscina Sampaio (fiscina@bahia.fiocruz.br) on 2016-02-04T11:32:50Z No. of bitstreams: 1 Carolina Thé Macedo Avaliação da acuracia...2015.pdf: 2036804 bytes, checksum: 926f70b1e7ec1709b317e04842607c6a (MD5)<br>Approved for entry into archive by Ana Maria Fiscina Sampaio (fiscina@bahia.fiocruz.br) on 2016-02-04T11:33:56Z (GMT) No. of bitstreams: 1 Carolina Thé Macedo Avaliação da acuracia...2015.pdf: 2036804 bytes, checksum: 926f70b1e7ec1709b317e04842607c6a (MD5)<br>Made available in DSpace on 2016-02-04T11:33:56Z (GMT). No. of bitstreams: 1 Carolina Thé Macedo Avaliaç
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Cucchini, Umberto. "Left-ventricular remodeling after first acute myocardial infarction: the predictive role of echocardiographic strain indexes." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3424549.

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Introduction and Objectives: The adverse remodeling of the left ventricle (LV) after ST-elevation acute myocardial infarction (STEMI) is a complex phenomenon characterized by different phases. Firstly, the infarct expands during the healing process through thinning and enlargement of necrotic area; secondarily, there is a global LV volume increase and systolic dysfunction that involves the remote myocardium through hypertrophy, apoptosis and interstitial collagen deposition. Several studies found a close correlation between infarct size and LV remodeling; others associated the adverse remod
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D'Ascenzi, Flavio. "Atrial function and loading conditions in athletes." Doctoral thesis, Umeå universitet, Institutionen för folkhälsa och klinisk medicin, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-134873.

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Intensive training is associated with hemodynamic changes that typically induce an enlargement of cardiac chamber. Despite LA dilatation in athletes has been interpreted as a benign adaptation, little evidence is available. The aim of this thesis is to demonstrate that LA size changes in response to alterations in loading conditions and to analyse atrial myocardial function in athletes through the application of novel echocardiographic techniques. We found that top-level athletes exhibit a dynamic morphological and functional LA remodelling, induced by training, with an increase in reservoir a
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Duque, Anderson Silveira. "Efeitos da terapia com ondas de choque na mecânica ventricular avaliada pela técnica de speckle tracking em pacientes com angina refratária." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/5/5131/tde-09042018-093017/.

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A doença aterosclerótica coronariana tem um grande impacto na morbidade e mortalidade em todo mundo. A terapia cardíaca com ondas de choque consiste em uma nova opção potencial para o tratamento de pacientes com doença coronariana crônica e angina refratária. No presente estudo, avaliamos os efeitos das ondas de choque na mecânica do ventrículo esquerdo, avaliados pela ecocardiografia com speckle tracking, assim como nos sintomas clínicos e isquemia miocárdica em pacientes com angina refratária. Estudamos, prospectivamente, 19 pacientes com angina refratária submetidos à terapia com ondas de c
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Martins, Raimy Costa. "Adaptação ventricular esquerda em cães de pastoreio." Universidade Federal do Pampa, 2017. http://dspace.unipampa.edu.br:8080/xmlui/handle/riu/1645.

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Submitted by Marcos Anselmo (marcos.anselmo@unipampa.edu.br) on 2017-06-12T13:51:00Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) RAIMY COSTA MARTINS.pdf: 1412873 bytes, checksum: 1a015a5d3ada01cbd7dea500b27c388a (MD5)<br>Approved for entry into archive by Marcos Anselmo (marcos.anselmo@unipampa.edu.br) on 2017-06-12T13:51:13Z (GMT) No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) RAIMY COSTA MARTINS.pdf: 1412873 bytes, checksum: 1a015a5d3ada01cbd7dea500b27c388a (MD5)<br>Made available in DSpac
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Filho, Antonio Tito Paladino. "Avaliação de fibrose miocárdica pelo strain, comparado ao achado de realce tardio da ressonância magnética cardíaca, em pacientes portadores de cardiopatia chagásica crônica." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/98/98131/tde-07102016-082606/.

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Desde o primeiro relato a Doença de Chagas permanece endêmica na América Latina com 18 milhões de pessoas cronicamente infectadas e, aproximadamente, 200.000 novos casos por ano. Doença parasitária causada por Trypanosoma cruzi, tem como transmissor \"natural\" da doença um inseto hematófago, o Reduris (barbeiro). Este inseto se torna infectado ao ingerir o sangue de um animal ou indivíduo infectado com o Trypanosoma cruzi. O contágio ocorre basicamente nas áreas rurais nas quais o homem, frequentemente, está em contato com hospedeiros e vetores ao destruir a mata nativa. Apesar da infecção ge
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Gustafsson, Ulf. "Ventricular rotation and the rotation axis : a new concept in cardiac function." Doctoral thesis, Umeå universitet, Medicin, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-37187.

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Background: The twisting motion of the left ventricle (LV), with clockwise rotation at the base and counter clockwise rotation at the apex during systole, is a vital part of LV function. Even though LV rotation has been studied for decades, the rotation pattern has not been described in detail. By the introduction of speckle tracking echocardiography measuring rotation has become easy of access. However, the axis around which the LV rotates has never before been assessed. The aims of this thesis were to describe the rotation pattern of the LV in detail (study I), to assess RV apical rotation (
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Schmitt, Benjamin A. "Utility of a Volume-Regulated Drive System for Direct Mechanical Ventricular Actuation." Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1389634127.

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Doucende, Grégory. "Adaptations cardiaques à l’exercice aigu, chronique et épuisant de longue durée : mise en évidence du rôle clé du mécanisme de torsion - détorsion dans le remplissage ventriculaire gauche." Thesis, Avignon, 2010. http://www.theses.fr/2010AVIG0703/document.

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Lors de la systole, le ventricule gauche (VG) se déforme suite à la contraction des cardiomyocytes. De part l’orientation en spirale des fibres myocardiques, ces déformations incluent un mouvement de torsion, la base et l’apex du VG tournant dans des sens opposés. L’emmagasinement d’énergie élastique par ce mécanisme et surtout sa restitution très précoce en début de diastole jouent un rôle clé dans le remplissage ventriculaire gauche. Les objectifs de ce travail ont été d’étudier les adaptations mécaniques ventriculaires gauche en se focalisant sur le rôle de la torsion 1) lors d’un exercice
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Baker, Sinan, and Odai Alcharif. "Ekokardiografi: jämförelse av erfarenhetens betydelse vid mätningar av strain och strain rate i vänster kammare." Thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ, Avd. för naturvetenskap och biomedicin, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-44342.

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Bakgrund: Ekokardiografi har en betydande roll i diagnostisering av vänster kammare. Genom undersökning av segmentell och global longitudinell strain samt strain rate kan regional och global kinetik bedömas. Vid kontraktion och relaxation deformeras myokardiet varvid segmentell strain mäter deformationen av respektive segment uttryckt i procent medan strain rate mäter hastigheten av deformationen. Genom summering av medelvärdet från alla segment erhålls global longitudinell strain. Syfte: Syftet med studien var att jämföra ultraljudbaserade segmentell och global strain samt strain rate i vänst
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Ding, Wenhong. "Survival and functional recovery following valve replacement in patients with severe aortic stenosis." Doctoral thesis, Umeå universitet, Medicin, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-82644.

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Background: Aortic stenosis (AS) is the most common heart valve disease in Europe and North America. Age-related calcification of the valve is the commonest cause of acquired AS, especially in patients older than 70 years.Conventional surgical aortic valve replacement (SAVR) and the novel, minimally invasive transcatheter aortic valve implantation (TAVI), effectively preserve left ventricular (LV) function, relieve symptoms and improve survival in patients with severe symptomatic AS. However, patients with impaired LV function may carry significant operative risk, and long recovery time. In ad
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Khan, Fakhar Zaman. "Prospective left ventricular lead targeting in cardiac resynchronisation therapy." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608297.

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Rabe, Nasim Estelle. "Prevalens av nedsättning av hjärtats vänsterkammares longitudinella funktion hos patienter med aortastenos." Thesis, Uppsala universitet, Institutionen för kvinnors och barns hälsa, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385706.

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Background:Left ventricular function is particularly important to investigate since it has prognostic significance in some heart diseases such as aortic stenosis. One of the relatively new methods to evaluate this is deformation analysis that can produce a measure of global longitudinal strain with speckle-tracking.  Objective:The objective was to examine the possibility of measuring left ventricular longitudinal function in patients with aortic stenosis from ECG-gated computed tomography images with the new software Segment CT and investigate prevalence of its reduction. Additionally, a secon
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Strecha, Juraj. "Sledování pohybu srdečního svalstva v ultrazvukovém záznamu." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2015. http://www.nusl.cz/ntk/nusl-234947.

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he thesis deals with proposal of an algorithm and implementation of a program that tracks a motion of the heart muscle in the captured ultrasound video of the heart. The point position estimation is calculated by optical flow method. The Active Shape Model method is used to confirm the accuracy of point's position tracking. The user annotates desired structure of the heart arch first and the application displays new points which represent a new deformed heart shape.
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Vitiello, Damien. "Dysfonctions cardiaques transitoires induites par un exercice physique prolongé : Exploration mécanistique par une approche translationnelle." Phd thesis, Université d'Avignon, 2011. http://tel.archives-ouvertes.fr/tel-00943526.

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L'activité physique régulière est bénéfique pour la santé cardiovasculaire. Cependant, destravaux ont rapporté des dysfonctions cardiaques après des exercices physiques prolongés (EPP) tels que les marathons ou les triathlons longue distance type "Ironman". Ces dysfonctions sont souvent associées à des dommages myocardiques. Récemment, des études échocardiographiques ont suggéré que ces dysfonctions étaient associées à des baisses de contractilité et de relaxation myocardiques.Toutefois, l'atteinte myocardique après un EPP reste à ce jour controversée et les mécanismes sousjacents de ces dysfo
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Jashari, Haki. "The effect of pressure afterload due to aortic coarctation on left ventricular function in children." Doctoral thesis, Umeå universitet, Medicin, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-128126.

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Background: Coarctation of the aorta (CoA) is a congenital heart disease which represents a narrowing of the proximal descending aorta, hence increasing pressure afterload to the left ventricle (LV). Conventional treatment of native CoA is surgical repair, however potential recurrence or other related complications e.g. aortic rupture, heart failure and cerebrovascular events are common. Thus, lifelong follow-up of these patients is required. Echocardiography is the most patient’s friendly method to evaluate CoA and in particular its effect on LV function. Moreover, the novel speckle tracking
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Cameli, Matteo. "Mechanical and histological disturbances in advanced heart failure and cardiac transplantation." Doctoral thesis, Umeå universitet, Kardiologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-127295.

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The general purpose of this thesis is to establish capability and accuracy of speckle tracking echocardiography (STE) in assessing left atrial (LA), left ventricular (LV) and right ventricular (RV) function and their correlation with myocardial fibrosis, filling pressure and clinical outcomes in advanced heart failure (HF) patients before and after heart transplantation (HT). I demonstrated that HT recipients had impaired LV twist dynamics in the form of reduced rotation twist angle and untwist rate but time to peak twist was not different from the age matched controls and other cardiac surgic
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Walker, Valentin. "Étude du risque de cardiotoxicité radio-induite précoce chez des patientes traitées par radiothérapie pour un cancer du sein à partir de la cohorte prospective BACCARAT Early Detection of Cardiovascular Changes After Radiotherapy for Breast Cancer: Protocol for a European Multicenter Prospective Cohort (MEDIRAD EARLY HEART Study) Early Detection of Subclinical Left Ventricular Dysfunction After Breast Cancer Radiation Therapy Using Speckle-tracking Echocardiography: Association between Cardiac Exposure and Longitudinal Strain Changes (BACCARAT Study)." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASR003.

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La radiothérapie (RT), traitement adjuvant du cancer du sein, est associée à un risque accru de pathologies cardiovasculaires plusieurs années post-RT. L'identification de signes précoces de cardiotoxicité et la mise en évidence de leurs liens avec la dose de rayonnements ionisants absorbée par le cœur pourraient favoriser la prédiction de la survenue de pathologies cardiovasculaires et améliorer la prévention chez les patientes à risque.Cette thèse s’appuie sur la cohorte BACCARAT constituée d’une centaine de patientes traitées par RT du sein, sans chimiothérapie et suivies jusqu’à 24 mois po
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Zhou, Yirong. "Left Ventricular Dynamics and Pulsatile Hemodynamics during Resuscitation of the Fibrillating Heart Using Direct Mechanical Ventricular Actuation." Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1547503362869157.

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Hodzic, Amir. "Exploration du coeur d'athlète à l'aide d'outils échocardiographiques d'analyse de la déformation myocardique, des volumes ventriculaires et des flux intra cavitaires Accuracy of speckle tracking in the context of stress echocardiography in short axis view: an in vitro validation study Analysis of inter-system variability of systolic and diastolic intraventricular pressure gradients derived from color Doppler M-mode echocardiography Echocardiographic evidence of left ventricular untwisting-filling interplay Cardiovascular adaptations in American-style football players in response to the inter- season training Right ventricular global and regional remodeling in American-style-football athletes: a longitudinal 3D echocardiographic study." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMC428.

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L’athlète entrainé est un modèle physiologique d’adaptation cardiaque extrême où il est parfois difficile de faire la distinction entre le remodelage cardiaque adaptatif induit par l’exercice physique et certaines cardiomyopathies débutantes. L’échocardiographie est l’examen d’imagerie de premier choix pour l’étude du cœur d’athlète au repos et à l’effort. Les développements semi-récents du speckle tracking et de l’imagerie tridimensionnelle (3D) ont montré un intérêt clinique dans la description de la réponse cardiaque à l’exercice. Toutefois certains aspects techniques nécessitent d’être inv
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Philouze, Clothilde. "Dépistage des altérations précoces de la fonction régionale myocardique par échocardiographie de stress et effet d’une intervention par supplémentation en vitamine D3 dans le diabète de type 2 : approche translationnelle." Thesis, Avignon, 2018. http://www.theses.fr/2018AVIG0346/document.

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Le diabète est aujourd’hui la 7ème cause de mortalité dans le monde. Dans cette population, la cardiomyopathie diabétique est la principale cause de morbi-mortalité. Le développement de cette complication débutant dès l’apparition du diabète, un dépistage et une prise en charge précoces de cette pathologie sont donc de première importance et sont les deux objectifs visés par ces travaux. La première étude que nous avons réalisée a permis de démontrer l’utilité d’une évaluation compréhensive de la fonction régionale myocardique gauche par 2D speckle-tracking imaging, en conditions de stress à l
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