keyword
MENU ▼
Read by QxMD icon Read
search

Myocardial strain

keyword
https://www.readbyqxmd.com/read/29239028/recovery-of-myocardial-mechanics-in-kawasaki-disease-demonstrated-by-speckle-tracking-and-tissue-doppler-methods
#1
Emine Azak, Ibrahim Ilker Cetin, Hazım A Gursu, Ayse Esin Kibar, Murat Surucu, Ali Orgun, Utku Pamuk
AIM: To investigate myocardial deformation and function during treatment for Kawasaki disease (KD) in children. METHODS: We performed speckle tracking echocardiography (STE) and tissue Doppler imaging (TDI) in 15 children with KD and 15 healthy children during treatment for KD. STE was performed for longitudinal and circumferential strain (S) and strain rate (SR) at the left ventricle (LV) and for longitudinal S and SR at the right ventricle (RV). TDI was performed at the base of interventricular septum (IVS), LV, and RV...
December 13, 2017: Echocardiography
https://www.readbyqxmd.com/read/29238854/effect-of-weight-extremes-on-ventricular-volumes-and-myocardial-strain-in-repaired-tetralogy-of-fallot-as-measured-by-cmr
#2
Scott A Simpson, Suzanne L Field, Meng Xu, Benjamin R Saville, David A Parra, Jonathan H Soslow
Pulmonary valve replacement (PVR) in patients with repaired tetralogy of Fallot (rTOF-TAP) is often based on cardiac MRI (CMR) right ventricular (RV) volumes indexed to body surface area (BSA). Weight extremes result in increased patient morbidity and affect indexed measurements. We hypothesized that patients with rTOF-TAP at extremes of weight have (1) over- or underestimated indexed volumes and (2) altered parameters of cardiac function. CMRs in patients with rTOF-TAP were retrospectively reviewed; analysis included right and left ventricular (LV) volumes and ejection fractions (EF) and peak global LV circumferential strain (ε cc) from myocardial tagged images...
December 14, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/29237455/molecular-and-histological-effects-of-mr-guided-pulsed-focused-ultrasound-to-the-rat-heart
#3
Kee W Jang, Tsang-Wei Tu, Matthew E Nagle, Bobbi K Lewis, Scott R Burks, Joseph A Frank
BACKGROUND: Image-guided high intensity focused ultrasound has been used as an extracorporeal cardiac pacing tool and to enhance homing of stem cells to targeted tissues. However, molecular changes in the myocardium after sonication have not been widely investigated. Magnetic-resonance (MR)-guided pulsed focused ultrasound (pFUS) was targeted to the rat myocardium over a range of pressures and the microenvironmental and histological effects were evaluated over time. METHODS: Eight-to-ten-week-old Sprague-Dawley rats received T2-weighted MR images to target pFUS to the left ventricular and septum without cardiac or respiratory gating...
December 13, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29236974/diabetes-as-an-independent-predictor-of-left-ventricular-longitudinal-strain-reduction-at-rest-and-during-dobutamine-stress-test-in-patients-with-significant-coronary-artery-disease
#4
Karina Wierzbowska-Drabik, Ewa Trzos, Malgorzata Kurpesa, Tomasz Rechcinski, Dawid Miskowiec, Urszula Cieslik-Guerra, Barbara Uznanska-Loch, Maria Sobczak, Jaroslaw Damian Kasprzak
Aims: Diabetes (DM) is a strong cardiovascular risk factor modifying also the left ventricular (LV) function that may be objectively assessed with echocardiographic strain analysis. Although the impact of isolated DM on myocardial deformation has been already studied, few data concern diabetics with coronary artery disease (CAD), especially in all stages of dobutamine stress echocardiography (DSE). We compared LV systolic function during DSE in CAD with and without DM using state-of-the art speckle-tracking quantification and assessed the impact of DM on LV systolic strain...
December 9, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29234935/cardiac-and-respiratory-gated-volumetric-murine-ultrasound
#5
Arvin H Soepriatna, Frederick W Damen, Pavlos P Vlachos, Craig J Goergen
Current cardiovascular ultrasound mainly employs planar imaging techniques to assess function and physiology. These techniques rely on geometric assumptions, which are dependent on the imaging plane, susceptible to inter-observer variability, and may be inaccurate when studying complex diseases. Here, we developed a gated volumetric murine ultrasound technique to visualize cardiovascular motion with high spatiotemporal resolution and directly evaluate cardiovascular health. Cardiac and respiratory-gated cine loops, acquired at 1000 frames-per-second from sequential positions, were temporally registered to generate a four-dimensional (4D) dataset...
December 12, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29232024/myocardial-perfusion-reserve-index-in-children-with-kawasaki-disease
#6
Richard M Friesen, Michal Schäfer, Pei-Ni Jone, Nana Appiawiah, Daniel Vargas, Brian Fonseca, Michael V DiMaria, Uyen Truong, LaDonna Malone, Lorna P Browne
BACKGROUND: Coronary artery lesions in patients with Kawasaki disease (KD) can impair myocardial perfusion, yet evaluation of perfusion defects by cardiac magnetic resonance (MR) in children is often qualitative. PURPOSE: In this study we aimed to use a quantitative method of myocardial perfusion using stress cardiac MR-derived myocardial perfusion reserve index (MPRI) in children with KD and compare MPRI with ventricular mechanical performance evaluated by cardiac MR strain analysis...
December 12, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29230843/cardiac-function-in-pediatric-patients-with-congenital-adrenal-hyperplasia-due-to-21-hydroxylase-deficiency
#7
Christiaan F Mooij, Milanthy S Pourier, Gert Weijers, Chris L de Korte, Zina Fejzic, Hedi L Claahsen van der Grinten, Livia Kapusta
BACKGROUND: Hyperandrogenism and exogenous glucocorticoid excess may cause unfavorable changes in the cardiovascular risk profile of patients with congenital adrenal hyperplasia (CAH). OBJECTIVE: To evaluate the cardiac function in pediatric patients with CAH. PATIENTS AND METHODS: 27 pediatric patients with CAH, aged 8-16 years, were evaluated by physical examination, electrocardiogram (ECG), conventional echocardiography, tissue Doppler imaging and two-dimensional (2D) myocardial strain (rate) imaging...
December 11, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/29229494/classic-pattern-dyssynchrony-in-adolescents-and-adults-with-a-fontan-circulation
#8
Assami Rösner, Tigran Khalapyan, Håvard Dalen, Doff B McElhinney, Mark K Friedberg, George K Lui
BACKGROUND: Previous studies have suggested the presence of dyssynchrony in the functionally single ventricle. The aim of this study was to investigate the presence of classic-pattern dyssynchrony (CPD), characterized by typical early and late deformation of opposite walls, and its relation to QRS duration and myocardial function in patients with single-ventricle physiology after Fontan palliation. METHODS: In a retrospective cross-sectional study, 101 adolescent and adult patients with single-ventricle physiology after the Fontan procedure were investigated...
December 8, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29229143/myocardial-functional-changes-in-transfemoral-versus-transapical-aortic-valve-replacement
#9
Niraj Asthana, Aditya Mantha, Eric H Yang, William Suh, Olcay Aksoy, Richard J Shemin, Gabriel Vorobiof, Peyman Benharash
BACKGROUND: Transcatheter aortic valve replacement (TAVR) has greatly expanded the treatment options available for patients with severe aortic stenosis at high surgical risk. MATERIALS AND METHODS: We compared changes in myocardial function in TAVR with a transfemoral (TF) versus a transapical (TA) approach at a major tertiary hospital from 2012-2016. Traditional echocardiographic measures of cardiac structure and function were tracked, alongside the use of two-dimensional speckle tracking echocardiography to measure myocardial strain and strain rates...
January 2018: Journal of Surgical Research
https://www.readbyqxmd.com/read/29228952/association-between-left-ventricular-mechanics-and-diffuse-myocardial-fibrosis-in-patients-with-repaired-tetralogy-of-fallot-a-cross-sectional-study
#10
Christopher M Haggerty, Jonathan D Suever, Arichanah Pulenthiran, Abba Mejia-Spiegeler, Gregory J Wehner, Linyuan Jing, Richard J Charnigo, Brandon K Fornwalt, Mark A Fogel
BACKGROUND: Patients with repaired tetralogy of Fallot (TOF) have progressive, adverse biventricular remodeling, leading to abnormal contractile mechanics. Defining the mechanisms underlying this dysfunction, such as diffuse myocardial fibrosis, may provide insights into poor long-term outcomes. We hypothesized that left ventricular (LV) diffuse fibrosis is related to impaired LV mechanics. METHODS: Patients with TOF were evaluated with cardiac magnetic resonance in which modified Look-Locker (MOLLI) T1-mapping and spiral cine Displacement encoding (DENSE) sequences were acquired at three LV short-axis positions...
December 11, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29227821/scan-rescan-reproducibility-of-ventricular-and-atrial-mri-feature-tracking-strain
#11
Jérôme Lamy, Gilles Soulat, Morgane Evin, Adrian Huber, Alain de Cesare, Alain Giron, Benoit Diebold, Alban Redheuil, Elie Mousseaux, Nadjia Kachenoura
BACKGROUND: A feature tracking (FT) was designed to simultaneously extract myocardial strains in main cardiac chambers from cine MRI images. Its inter-observer and scan-rescan reproducibility was assessed and sample sizes required to detect predefined longitudinal changes in strain values were provided. METHOD: FT was applied on left (LV) and right (RV) ventricles as well as left atrium (LA) of 21 individuals (66 ± 10 years) who underwent 2 MRIs 2 weeks apart...
November 24, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29226384/the-impact-of-volume-overload-on-right-heart-function-in-end-stage-renal-disease-patients-on-hemodialysis
#12
Serkan Ünlü, Asife Şahinarslan, Gökhan Gökalp, Özden Seçkin, Selim Turgay Arınsoy, Nuri Bülent Boyacı, Atiye Çengel
PURPOSE: The aim of this study was to evaluate the impact of volume overload on echocardiographic parameters used for the assessment of the right ventricle (RV) and right atrium (RA), to determine volume-independent parameters and to noninvasively investigate the physio-mechanics of RV and RA by examining end-stage kidney patients before and after hemodialysis (HD). METHODS: The echocardiographic images were obtained from 67 patients (49.2 ± 17.3 years, 23 f) before and after HD...
December 11, 2017: Echocardiography
https://www.readbyqxmd.com/read/29226213/reference-ranges-and-reproducibility-studies-for-right-heart-myocardial-deformation-by-feature-tracking-cardiovascular-magnetic-resonance-imaging
#13
Boyang Liu, Ahmed M Dardeer, William E Moody, Nicola C Edwards, Lucy E Hudsmith, Richard P Steeds
Feature tracking of the right heart on cardiac MRI is a novel and promising technique for the measurement of right heart myocardial strain. We present here the reference ranges for right ventricular longitudinal strain and strain rate, as well as peak strain of the right atrium within a cohort of 100 healthy individuals recruited from the UK. We present data on the reproducibility of these feature tracking techniques and explore relationship between strain and baseline demographic parameters.
February 2018: Data in Brief
https://www.readbyqxmd.com/read/29222822/coronary-microvascular-dysfunction-and-myocardial-contractile-reserve-in-women-with-angina-and-no-obstructive-coronary-artery-disease
#14
Marie M Michelsen, Adam Pena, Naja D Mygind, Jan Bech, Ida Gustafsson, Jens Kastrup, Henrik S Hansen, Nis Høst, Peter R Hansen, Eva Prescott
BACKGROUND: Coronary microvascular dysfunction (CMD) is a potential cause of myocardial ischemia and may affect myocardial function at rest and during stress. We investigated whether CMD was associated with left ventricular diastolic and systolic function at rest and during pharmacologically induced hyperemic stress. METHODS: In a prospective cohort study, we included 963 women with angina, left ventricular ejection fraction (LVEF) >45%, and an invasive coronary angiogram without significant stenosis (<50%)...
December 8, 2017: Echocardiography
https://www.readbyqxmd.com/read/29222133/gdf-15-growth-differentiation-factor-15-is-associated-with-lack-of-ventricular-recovery-and-mortality-after-transcatheter-aortic-valve-replacement
#15
Juyong Brian Kim, Yukari Kobayashi, Kegan J Moneghetti, Daniel A Brenner, Ryan O'Malley, Ingela Schnittger, Joseph C Wu, Gillian Murtagh, Agim Beshiri, Michael Fischbein, D Craig Miller, David Liang, Alan C Yeung, Francois Haddad, William F Fearon
BACKGROUND: Recent data suggest that circulating biomarkers may predict outcome in patients undergoing transcatheter aortic valve replacement (TAVR). We examined the association between inflammatory, myocardial, and renal biomarkers and their role in ventricular recovery and outcome after TAVR. METHODS AND RESULTS: A total of 112 subjects undergoing TAVR were included in the prospective registry. Plasma levels of B-type natriuretic peptide, hs-TnI (high-sensitivity troponin I), CRP (C-reactive protein), GDF-15 (growth differentiation factor 15), GAL-3 (galectin-3), and Cys-C (cystatin-C) were assessed before TAVR and in 100 sex-matched healthy controls...
December 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29217634/anthracycline-cardiotoxicity-an-update-on-mechanisms-monitoring-and-prevention
#16
REVIEW
Peter A Henriksen
Anthracycline chemotherapy causes dose-related cardiomyocyte injury and death leading to left ventricular dysfunction. Clinical heart failure may ensue in up to 5% of high-risk patients. Improved cancer survival together with better awareness of the late effects of cardiotoxicity has led to growing recognition of the need for surveillance of anthracycline-treated cancer survivors with early intervention to treat or prevent heart failure. The main mechanism of anthracycline cardiotoxicity is now thought to be through inhibition of topoisomerase 2β resulting in activation of cell death pathways and inhibition of mitochondrial biogenesis...
December 7, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29216794/fragmented-qrs-complexes-are-associated-with-left-ventricular-dysfunction-in-patients-with-type-2-diabetes-mellitus-a-two-dimensional-speckle-tracking-echocardiography-study
#17
Adil Bayramoğlu, Hakan Taşolar, Yasemin Kaya, Osman Bektaş, Ahmet Kaya, Mehmet Yaman, Zeki Yüksel Günaydın
BACKGROUND: Heart failure may develop independently of coronary artery disease in diabetes mellitus (DM) patients. Fragmented QRS (fQRS) is a marker of myocardial fibrosis or scar tissue and is related to an increase in cardiovascular adverse events. In this study, we examined the utility of speckle tracking echocardiography (STE) in assessing LV function in DM patients with fQRS. METHODS AND RESULTS: The current study included 178 consecutive patients diagnosed with type-2 DM...
December 7, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/29216285/myocardial-adaption-to-hi-r-t-in-previously-untrained-men-with-a-randomized-longitudinal-cardiac-mr-imaging-study-physical-adaptions-in-untrained-on-strength-and-heart-trial-push-trial
#18
Michael Scharf, Derya Oezdemir, Axel Schmid, Wolfgang Kemmler, Simon von Stengel, Matthias S May, Michael Uder, Michael M Lell
OBJECTIVE: Although musculoskeletal effects in resistance training are well described, little is known about structural and functional cardiac adaption in formerly untrained subjects. We prospectively evaluated whether short term high intensity (resistance) training (HI(R)T) induces detectable morphologic cardiac changes in previously untrained men in a randomized controlled magnetic resonance imaging (MRI) study. MATERIALS AND METHODS: 80 untrained middle-aged men were randomly assigned to a HI(R)T-group (n = 40; 43...
2017: PloS One
https://www.readbyqxmd.com/read/29214787/myocardial-layer-specific-strain-analysis-in-children-with-mitochondrial-disease
#19
Lucy Youngmin Eun, Young Mock Lee
PURPOSE: Children with mitochondrial disease (MD) have clinical phenotypes that are more severe than those found in adults. In this study, we assessed cardiac function in children with MD using conventional and advanced echocardiographic measurements, explored any unique patterns present, and investigated the development of early cardiomyopathy (CMP). MATERIALS AND METHODS: We retrospectively reviewed the medical records of 33 children with MD. All patients underwent transthoracic echocardiography with conventional and advanced myocardial analysis...
January 2018: Yonsei Medical Journal
https://www.readbyqxmd.com/read/29211878/normal-reference-values-of-multilayer-longitudinal-strain-according-to-age-decades-in-a-healthy-population-a-single-centre-experience
#20
Gian Marco Alcidi, Roberta Esposito, Vincenzo Evola, Ciro Santoro, Maria Lembo, Regina Sorrentino, Francesco Lo Iudice, Francesco Borgia, Giuseppina Novo, Bruno Trimarco, Patrizio Lancellotti, Maurizio Galderisi
Aims: Recent advancements in echocardiographic technology allow to analyse myocardial strain in multiple layers. Little is known about the impact of age on layer-specific longitudinal strain in healthy subjects. The aim of this study was to analyse the influence of age on multilayer longitudinal strain and establish normal reference values of layer-specific strain according to age decades in a healthy population referring to our echo laboratory using 2D speckle-tracking echocardiography with layer-specific software...
December 2, 2017: European Heart Journal Cardiovascular Imaging
keyword
keyword
26144
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"