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circumferential strain

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https://www.readbyqxmd.com/read/28648418/longitudinal-ventricular-systolic-dysfunction-in-patients-with-very-severe-obstructive-sleep-apnea-a-case-control-study-using-speckle-tracking-imaging
#1
Mithun Jacob Varghese, Gautam Sharma, Garima Shukla, Sandeep Seth, Sundeep Mishra, Anupama Gupta, Vinay Kumar Bahl
OBJECTIVE: Obstructive sleep apnea (OSA) is a prevalent condition that is increasingly recognized to be associated with cardiovascular disease. We aimed to investigate the subclinical systolic ventricular dysfunction of patients with OSA using novel speckle tracking echocardiographic (STE) techniques. METHODS: This study included 31 patients of polysomnography proven very severe OSA [Apnea Hypopnea Index(AHI) >40] and an equal number of matched population with no OSA as controls...
May 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28648394/prevalence-correlates-and-prognostic-relevance-of-myocardial-mechanical-dispersion-as-assessed-by-feature-tracking-cardiac-magnetic-resonance-after-a-first-st-segment-elevation-myocardial-infarction
#2
Daniele Muser, Chiara Tioni, Ranjit Shah, Joseph B Selvanayagam, Gaetano Nucifora
Postinfarction mechanical dispersion (MD), that is, the regional heterogeneity of myocardial contraction throughout the cardiac cycle, has detrimental effects on left ventricular (LV) function and is related to the occurrence of heart failure and ventricular arrhythmias. However, its prevalence, pathophysiological determinants, and clinical utility are still unknown. The aim of the present study is to clarify these issues. In total, 130 consecutive patients (mean age 60 ± 12 years, 75% male) with a first ST-segment elevation myocardial infarction (STEMI) were included...
May 30, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28648119/is-there-a-relationship-between-increased-aortic-stiffness-and-segmental-left-ventricular-deformation-in-elite-athletes-insights-from-the-magyar-sport-study
#3
A Nemes, A Kalapos, P Domsik, M Oszlánczi, C Lengyel, L Balogh, T Forster
Introduction Myocardial contractility of the left ventricle (LV) is related to arterial distensibility. Sport activity is frequently associated with changes in both LV and arterial functions. This study aimed to find correlations between three-dimensional speckle-tracking echocardiography-derived segmental LV deformation parameters and echocardiographically assessed aortic stiffness index (ASI) in athletes. This study comprised 26 young elite athletes (mean age: 26.7 ± 8.4 years, nine men). Results Among segmental circumferential strains (CSs), only that of apical anterior (r = 0...
June 26, 2017: Physiology International
https://www.readbyqxmd.com/read/28644803/cardiac-strain-imaging-with-coherent-compounding-of-diverging-waves
#4
Julien Grondin, Vincent Sayseng, Elisa E Konofagou
Current methods of cardiac strain imaging at high frame rate suffer from motion matching artifacts or poor lateral resolution. Coherent compounding has been shown to improve echocardiographic image quality while maintaining high frame rate but has never been used to image cardiac strain. However, myocardial velocity can have an impact on coherent compounding due to displacements between frames. The objective of this study was to investigate the feasibility and performance of coherent compounding for cardiac strain imaging at a low and a high myocardial velocity...
June 20, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28639946/assessment-of-left-ventricular-systolic-function-in-patients-with-iron-deficiency-anemia-by-three-dimensional-speckle-tracking-echocardiography
#5
Qiao Zhou, Jiaqi Shen, Yue Liu, Runlan Luo, Bijun Tan, Guangsen Li
OBJECTIVE: The present study aimed to evaluate left ventricular (LV) systolic function in patients with iron deficiency anemia (IDA) by 3 dimensional speckle-tracking echocardiography (3DSTE). METHODS: Participants were grouped by hemoglobin (Hb) levels in order to study the effect of anemia on cardiac function. Group A included 40 healthy volunteers. Eighty-three patients who were diagnosed with IDA were divided into 2 groups according to the Hb level. Group B (Hb 9 g/dL) included 44 patients, while group C (Hb 6-9 g/dL) included 39 patients...
June 22, 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28637308/three-dimensional-right-ventricular-regional-deformation-and-survival-in-pulmonary-hypertension
#6
Pamela Moceri, Nicolas Duchateau, Delphine Baudouy, Elie-Dan Schouver, Sylvie Leroy, Fabien Squara, Emile Ferrari, Maxime Sermesant
Aims: Survival in pulmonary hypertension (PH) relates to right ventricular (RV) function. However, the RV unique anatomy and structure limit 2D analysis and its regional 3D function has not been studied yet. The aim of this study was to assess the implications of global and regional 3D RV deformation on clinical condition and survival in adults with PH and healthy controls. Methods and results: We collected a prospective longitudinal cohort of 104 consecutive PH patients and 34 healthy controls between September 2014 and December 2015...
June 15, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28637227/echocardiographic-reference-ranges-for-normal-left-ventricular-2d-strain-results-from-the-eacvi-norre-study
#7
Tadafumi Sugimoto, Raluca Dulgheru, Anne Bernard, Federica Ilardi, Laura Contu, Karima Addetia, Luis Caballero, Natela Akhaladze, George D Athanassopoulos, Daniele Barone, Monica Baroni, Nuno Cardim, Andreas Hagendorff, Krasimira Hristova, Teresa Lopez, Gonzalo de la Morena, Bogdan A Popescu, Marie Moonen, Martin Penicka, Tolga Ozyigit, Jose David Rodrigo Carbonero, Nico van de Veire, Ralph Stephan von Bardeleben, Dragos Vinereanu, Jose Luis Zamorano, Yun Yun Go, Monica Rosca, Andrea Calin, Julien Magne, Bernard Cosyns, Stella Marchetta, Erwan Donal, Gilbert Habib, Maurizio Galderisi, Luigi P Badano, Roberto M Lang, Patrizio Lancellotti
Aims: To obtain the normal ranges for 2D echocardiographic (2DE) measurements of left ventricular (LV) strain from a large group of healthy volunteers accounting for age and gender. Methods and results: A total of 549 (mean age: 45.6 ± 13.3 years) healthy subjects were enrolled at 22 collaborating institutions of the Normal Reference Ranges for Echocardiography (NORRE) study. 2DE data sets have been analysed with a vendor-independent software package allowing homogeneous measurements irrespective of the echocardiographic equipment used to acquire the data sets...
June 16, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28634695/assessment-of-early-diastolic-intraventricular-pressure-gradient-in-the-left-ventricle-among-patients-with-repaired-tetralogy-of-fallot
#8
Maki Kobayashi, Ken Takahashi, Mariko Yamada, Kana Yazaki, Kotoko Matsui, Noboru Tanaka, Sachie Shigemitsu, Katsumi Akimoto, Masahiko Kishiro, Keisuke Nakanishi, Shiori Kawasaki, Masaki Nii, Keiichi Itatani, Toshiaki Shimizu
Assessment of left ventricular (LV) dysfunction is vital in patients with repaired tetralogy of Fallot (rTOF). The early diastolic intraventricular pressure gradient (IVPG) in the LV plays an important role in diastolic function. IVPG is calculated as the intraventricular pressure difference divided by the LV length, which allows to account for differences in LV size and therefore calculate IVPG in children. We aimed to investigate the mechanisms of LV diastolic dysfunction by measuring mid-to-apical IVPG as an indicator of the active suction force sucking blood from the left atrium into the LV...
June 20, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28631145/biaxial-mechanical-properties-of-bovine-jugular-venous-valve-leaflet-tissues
#9
Hsiao-Ying Shadow Huang, Jiaqi Lu
Venous valve incompetence has been implicated in diseases ranging from chronic venous insufficiency (CVI) to intracranial venous hypertension. However, while the mechanical properties of venous valve leaflet tissues are central to CVI biomechanics and mechanobiology, neither stress-strain curves nor tangent moduli have been reported. Here, equibiaxial tensile mechanical tests were conducted to assess the tangent modulus, strength and anisotropy of venous valve leaflet tissues from bovine jugular veins. Valvular tissues were stretched to 60% strain in both the circumferential and radial directions, and leaflet tissue stress-strain curves were generated for proximal and distal valves (i...
June 19, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28630445/myocardial-deformation-in-cardiac-amyloid-light-chain-amyloidosis-assessed-with-3t-cardiovascular-magnetic-resonance-feature-tracking
#10
Rui Li, Zhi-Gang Yang, Hua-Yan Xu, Ke Shi, Xi Liu, Kai-Yue Diao, Ying-Kun Guo
Clinically, assessment of myocardial function is essential in patients with amyloid light-chain cardiac amyloidosis (AL-CA) to predict outcome and determine therapeutic approach. The aim of this study was to investigate the feasibility of cardiovascular magnetic resonance (CMR)-derived feature tracking algorithm for assessing left ventricular (LV) myocardial deformation in AL-CA, and to determine if these abnormal myocardial deformation parameters are correlated to impaired LV myocardial microvascular dysfunction...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28629574/biventricular-mechanics-in-prediction-of-severe-myocardial-fibrosis-in-patients-with-dilated-cardiomyopathy-cmr-study
#11
Łukasz Mazurkiewicz, Joanna Petryka, Mateusz Spiewak, Barbara Miłosz-Wieczorek, Konrad Werys, Łukasz A Małek, Magdalena Polanska-Skrzypczyk, Natalia Ojrzynska, Agata Kubik, Magdalena Marczak, Jolanta Misko, Jacek Grzybowski
PURPOSE: The purpose of this study was to compare the ability of various parameters of myocardial mechanics to predict large amounts of biventricular fibrosis assessed via T1 mapping in patients with dilated cardiomyopathy (DCM). MATERIAL: Cardiovascular magnetic resonance feature tracking analysis and T1 mapping were performed in 26 patients with DCM [mean age: 34.4±9.1years, 15 (57.6%) males]. The values of various parameters of myocardial mechanics at predicting advanced left-ventricle (LV) and right-ventricle (RV) fibrosis were compared using logistic regression analysis and receiver operating characteristic curve (ROC) analysis...
June 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28624332/comparison-of-magnetic-resonance-feature-tracking-with-cspamm-harp-for-the-assessment-of-global-and-regional-layer-specific-strain
#12
Daniel L R Kuetting, Andreas Feisst, Darius Dabir, Rami Homsi, Alois M Sprinkart, Julian Luetkens, Hans H Schild, Daniel K Thomas
PURPOSE: Layer specific strain assessment is increasingly being employed clinically. Cardiac magnetic resonance (MR) Feature Tracking (FT) is considered to be an adequate alternative for strain assessment. The aim of this study is to investigate the feasibility of FT derived layer specific strain assessment. METHODS: CSPAMM and SSFP-Cine sequences were acquired in 38 individuals (19 patients with HFpEF, 19 controls) in identical midventricular short-axis locations...
June 8, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28620752/fatty-metaplasia-quantification-and-impact-on-regional-myocardial-function-as-assessed-by-advanced-cardiac-mr-imaging
#13
Tomas Lapinskas, Bernhard Schnackenburg, Marc Kouwenhoven, Rolf Gebker, Alexander Berger, Remigijus Zaliunas, Burkert Pieske, Sebastian Kelle
OBJECTIVE: This study aimed to investigate the advantages of recently developed cardiac imaging techniques of fat-water separation and feature tracking to characterize better individuals with chronic myocardial infarction (MI). MATERIALS AND METHODS: Twenty patients who had a previous MI underwent CMR imaging. The study protocol included routine cine and late gadolinium enhancement (LGE) technique. In addition, mDixon LGE imaging was performed in every patient. Left ventricular (LV) circumferential (EccLV) and radial (ErrLV) strain were calculated using dedicated software (CMR(42), Circle, Calgary, Canada)...
June 15, 2017: Magma
https://www.readbyqxmd.com/read/28616762/a-systematic-comparison-of-cardiovascular-magnetic-resonance-and-high-resolution-histological-fibrosis-quantification-in-a-chronic-porcine-infarct-model
#14
Johannes M I H Gho, René van Es, Frebus J van Slochteren, Sanne J Jansen Of Lorkeers, Allard J Hauer, Joep W M van Oorschot, Pieter A Doevendans, Tim Leiner, Aryan Vink, Folkert W Asselbergs, Steven A J Chamuleau
The noninvasive reference standard for myocardial fibrosis detection on cardiovascular magnetic resonance imaging (CMR) is late gadolinium enhancement (LGE). Currently there is no consensus on the preferred method for LGE quantification. Moreover myocardial wall thickening (WT) and strain are measures of regional deformation and function. The aim of this research was to systematically compare in vivo CMR parameters, such as LGE, WT and strain, with histological fibrosis quantification. Eight weeks after 90 min ischemia/reperfusion of the LAD artery, 16 pigs underwent in vivo Cine and LGE CMR...
June 14, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28615141/diagnostic-capability-of-feature-tracking-cardiovascular-magnetic-resonance-to-detect-infarcted-segments-a-comparison-with-tagged-magnetic-resonance-and-wall-thickening-analysis
#15
R Ogawa, T Kido, M Nakamura, T Kido, A Kurata, M Miyagawa, T Mochizuki
AIM: To examine the diagnostic capabilities of feature-tracking cardiovascular magnetic resonance (FT-CMR), tagged cine magnetic resonance (MR), and wall thickening (WT) analyses to detect infarcted segments in patients with established myocardial infarction (MI). MATERIALS AND METHODS: Twenty patients with established MI were selected retrospectively and the peak endocardial circumferential strain (CS) was quantified based on the 16-segment model. According to CMR with late gadolinium enhancement, segments were categorised as transmural MI, subendocardial MI, and no MI...
June 11, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28610963/the-influence-of-night-time-hypertension-on-left-ventricular-mechanics
#16
Marijana Tadic, Cesare Cuspidi, Biljana Pencic-Popovic, Vera Celic, Giuseppe Mancia
OBJECTIVE: The aim of this study was to evaluate left ventricular (LV) mechanics in individuals with daytime, night-time and day-nighttime hypertension. METHODS: This cross-sectional study included 272 untreated subjects who underwent 24-hour ambulatory blood pressure monitoring and complete two-dimensional echocardiographic examination including strain analysis. According to current guidelines, night-time hypertension was defined as nocturnal systolic blood pressure≥120mmHg and/or diastolic blood pressure≥70mmHg and day-time hypertension as systolic blood pressure≥135mmHg and/or diastolic blood pressure≥85mmHg...
June 6, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28606187/investigation-on-left-ventricular-multi-directional-deformation-in-patients-of-hypertension-with-different-lvef
#17
Huimei Huang, Qinyun Ruan, Meiyan Lin, Lei Yan, Chunyan Huang, Liyun Fu
BACKGROUND: This study is aimed at investigating myocardial multi-directional systolic deformation in hypertensive with different left ventricular ejection fraction (LVEF), and exploring its contribution to LVEF. METHODS: One hundred and twenty-three patients with primary hypertension (HT) were divided into group A (LVEF ≥ 55%), group B (45% ≤ LVEF < 50%, or 50% ≤ LVEF < 55% + LVEDVI ≥ 97 ml/m(2)), and group C (LVEF < 45%). Two-dimensional strain echocardiography (2DSE) including LV longitudinal strain (SL), radial strain (SR) and circumferential strain (SC) were measured...
June 12, 2017: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/28599831/alterations-in-cardiac-deformation-timing-of%C3%A2-contraction-and-relaxation-and-early-myocardial-fibrosis-accompany-the-apparent-recovery-of-acute-stress-induced-takotsubo-cardiomyopathy-an-end-to-the-concept-of%C3%A2-transience
#18
Konstantin Schwarz, Trevor Ahearn, Janaki Srinivasan, Christopher J Neil, Caroline Scally, Amelia Rudd, Baljit Jagpal, Michael P Frenneaux, Cristina Pislaru, John D Horowitz, Dana K Dawson
BACKGROUND: Takotsubo syndrome is an increasingly recognized cause of chest pain and occasionally of cardiogenic shock. Despite rapid improvement of the left ventricular (LV) ejection fraction, recent registry data raise concerns about long-term prognosis. The aim of this study was to test the hypothesis that restoration of normal ejection fraction after acute takotsubo syndrome is not equivalent to full functional recovery. METHODS: Fifty-two patients with takotsubo syndrome (according to the Mayo Clinic criteria plus cardiac magnetic resonance imaging to exclude myocardial infarction) and 44 healthy control subjects of the same age, gender, and cardiovascular comorbidity distribution were prospectively recruited...
June 6, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28599827/late-detection-of-left-ventricular-dysfunction-using-two-dimensional-and-three-dimensional-speckle-tracking-echocardiography-in-patients-with-history-of-nonsevere-acute-myocarditis
#19
Thibault Caspar, Marie Fichot, Mickaël Ohana, Soraya El Ghannudi, Olivier Morel, Patrick Ohlmann
BACKGROUND: Acute myocarditis (AM) often involves the left ventricular (LV) subepicardium that might be displayed by cardiac magnetic resonance even late after the acute phase. In the absence of global or regional LV dysfunction, conventional transthoracic echocardiography (TTE) does not accurately identify tissue sequelae of AM. We sought to evaluate the diagnostic value of two-dimensional (2D) and three-dimensional (3D) speckle-tracking echocardiography to identify patients with a history of AM with preserved LV ejection fraction (LVEF)...
June 6, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28599825/left-ventricular-rotational-and-twist-mechanics-in%C3%A2-the-human-fetal-heart
#20
Ling Li, Mary Craft, Hao H Hsu, Ming Zhang, Berthold Klas, David A Danford, Shelby Kutty
BACKGROUND: The authors investigated left ventricular (LV) rotational indices, twist, and torsion in a large cohort of fetuses using two-dimensional speckle-tracking echocardiography. METHODS: Pregnant women (N = 102) were prospectively recruited for fetal two-dimensional speckle-tracking echocardiography. Because of variable fetal position, ventricular orientation was established using the location of the liver and LV position in relation to the right ventricle...
June 6, 2017: Journal of the American Society of Echocardiography
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