keyword
MENU ▼
Read by QxMD icon Read
search

Structural heart inter

keyword
https://www.readbyqxmd.com/read/29240546/the-psychosocial-themes-of-children-with-a-congenital-heart-defect
#1
Ronél van der Watt, Carina Pheiffer, Stephen Brown
Children living with a congenital heart defect (CHD) carry the burden of a condition affecting their biological, psychological, and social functioning. Even though the physical heartbeats of these children might be inaudible and defective, their intra- and inter-personal 'stories in sound' need to be heard and understood. The aim of this research study was to explore these 'stories in sound' in children diagnosed with CHD. A qualitative, exploratory, descriptive study using thematic analysis was conducted. Semi-structured interviews were conducted with six boys and three girls between the ages of eight and fourteen years, who were diagnosed with CHD...
November 2017: Journal of Child and Adolescent Mental Health
https://www.readbyqxmd.com/read/29222390/sodium-channel-remodeling-in-subcellular-microdomains-of-murine-failing-cardiomyocytes
#2
Mathilde R Rivaud, Esperanza Agullo-Pascual, Xianming Lin, Alejandra Leo-Macias, Mingliang Zhang, Eli Rothenberg, Connie R Bezzina, Mario Delmar, Carol Ann Remme
BACKGROUND: Cardiac sodium channel (NaV1.5) dysfunction contributes to arrhythmogenesis during pathophysiological conditions. Nav1.5 localizes to distinct subcellular microdomains within the cardiomyocyte, where it associates with region-specific proteins, yielding complexes whose function is location specific. We herein investigated sodium channel remodeling within distinct cardiomyocyte microdomains during heart failure. METHODS AND RESULTS: Mice were subjected to 6 weeks of transverse aortic constriction (TAC; n=32) to induce heart failure...
December 8, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29215142/cortical-thickness-resting-state-heart-rate-and-heart-rate-variability-in-female-adolescents
#3
Julian Koenig, Peter Parzer, Corinna Reichl, Ayaka Ando, Julian F Thayer, Romuald Brunner, Michael Kaess
Resting state heart rate variability (HRV) is a psychophysiological marker that has gained increasing research interest, in particular in developmental neuroscience. HRV has been shown to be associated with mental and physical health, beyond simple measures of heart rate (HR) and shows inter- and intraindividual variance across aging. Recently, three studies reported on a positive correlation between resting state HRV and cortical thickness in selected regions of interest (ROIs) in adult samples. Structural thickness, HRV, and HR change during the sensitive period of adolescence...
December 7, 2017: Psychophysiology
https://www.readbyqxmd.com/read/29175411/mechanistic-pbpk-model-of-the-heart-accounting-for-inter-individual-variability-development-and-performance-verification
#4
Zofia Tylutki, Aleksander Mendyk, Sebastian Polak
Modern model-based approaches to cardiac safety and efficacy assessment require accurate drug concentration-effect relationship establishment. Thus, knowledge of the active concentration of drugs in heart tissue is desirable along with inter-subject variability influence estimation. To that end, we developed a mechanistic physiologically based pharmacokinetic (PBPK) model of the heart. The models were described with literature-derived parameters and written in R v.3.4.0. Five parameters were estimated. The model was fitted to amitriptyline and nortriptyline concentrations after an intravenous infusion of amitriptyline...
November 23, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29138508/fetal-cardiac-cine-magnetic-resonance-imaging-in-utero
#5
Jerome Chaptinel, Jerome Yerly, Yvan Mivelaz, Milan Prsa, Leonor Alamo, Yvan Vial, Gregoire Berchier, Chantal Rohner, François Gudinchet, Matthias Stuber
Fast magnetic resonance imaging (MRI) led to the emergence of 'cine MRI' techniques, which enable the visualization of the beating heart and the assessment of cardiac morphology and dynamics. However, established cine MRI methods are not suitable for fetal heart imaging in utero, where anatomical structures are considerably smaller and recording an electrocardiogram signal for synchronizing MRI data acquisition is difficult. Here we present a framework to overcome these challenges. We use methods for image acquisition and reconstruction that robustly produce images with sufficient spatial and temporal resolution to detect the heart contractions of the fetus, enabling a retrospective gating of the images and thus the generation of images of the beating heart...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29096125/biaxial-mechanical-behavior-of-bovine-saphenous-venous-valve-leaflets
#6
Jiaqi Lu, Hsiao-Ying Shadow Huang
Chronic venous disease is caused by chronic venous insufficiency (CVI), which results in significant symptoms such as venous ulcers, ankle eczema, leg swelling, etc. Venous valve incompetence is a major cause of CVI. When the valves of veins in the leg become incompetent (i.e., do not close properly), blood is able to flow backwards (i.e., reflux), which results in blood pooling in the lower extremities, distal venous hypertension, and CVI. Current clinical therapies, such as surgical venous valve reconstruction and bioprosthetic venous valve replacement, are highly invasive and only moderately successful...
October 24, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28964115/highly-trabeculated-structure-of-the-human-endocardium-underlies-asymmetrical-response-to-low-energy-monophasic-shocks
#7
Adam Connolly, Matthew D Robson, Jürgen Schneider, Rebecca Burton, Gernot Plank, Martin J Bishop
Novel low-energy defibrillation therapies are thought to be driven by virtual-electrodes (VEs), due to the interaction of applied monophasic electric shocks with fine-scale anatomical structures within the heart. Significant inter-species differences in the cardiac (micro)-anatomy exist, however, particularly with respect to the degree of endocardial trabeculations, which may underlie important differences in response to low-energy defibrillation protocols. Understanding the interaction of monophasic electric fields with the specific human micro-anatomy is therefore imperative in facilitating the translation and optimisation of these promising experimental therapies to the clinic...
September 2017: Chaos
https://www.readbyqxmd.com/read/28934404/organizational-and-managerial-factors-associated-with-clinical-practice-guideline-adherence-a-simulation-based-study-in-36-french-hospital-wards
#8
Florence Saillour-Glénisson, Marion Kret, Sandrine Domecq, Matthieu Sibé, Valentin Daucourt, Virginie Migeot, David Veillard, Philippe Michel
Objectives: To identify managerial and organizational characteristics of multi-specialty medicine wards and individual characteristics of health professionals that are most strongly associated with clinical practice guidelines (CPG) adherence. Design: Cross-sectional stratified cluster sample design. Setting: Data were gathered from 36 randomly selected multi-specialty medicine wards. Participants: The study population included all health professionals involved in patient care working in the participating wards...
August 1, 2017: International Journal for Quality in Health Care
https://www.readbyqxmd.com/read/28874934/emergency-physician-performed-transesophageal-echocardiography-in-simulated-cardiac-arrest
#9
Don V Byars, Jordan Tozer, John M Joyce, Michael J Vitto, Lindsay Taylor, Turan Kayagil, Matt Jones, Matthew Bishop, Barry Knapp, David Evans
INTRODUCTION: Transesophageal echocardiography (TEE) is a well-established method of evaluating cardiac pathology. It has many advantages over transthoracic echocardiography (TTE), including the ability to image the heart during active cardiopulmonary resuscitation. This prospective simulation study aims to evaluate the ability of emergency medicine (EM) residents to learn TEE image acquisition techniques and demonstrate those techniques to identify common pathologic causes of cardiac arrest...
August 2017: Western Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28862943/inter-relations-of-orthostatic-blood-pressure-change-aortic-stiffness-and-brain-structure-and-function-in-young-adults
#10
Leroy L Cooper, Jayandra J Himali, Alyssa Torjesen, Connie W Tsao, Alexa Beiser, Naomi M Hamburg, Charles DeCarli, Ramachandran S Vasan, Sudha Seshadri, Matthew P Pase, Gary F Mitchell
BACKGROUND: Relations of orthostatic change in blood pressure with brain structure and function have not been studied thoroughly, particularly in younger, healthier individuals. Elucidation of factors that contribute to early changes in brain integrity may lead to development of interventions that delay or prevent cognitive impairment. METHODS AND RESULTS: In a sample of the Framingham Heart Study Third Generation (N=2119; 53% women; mean age±SD, 47±8 years), we assessed orthostatic change in mean arterial pressure (MAP), aortic stiffness (carotid-femoral pulse wave velocity), neuropsychological function, and markers of subclinical brain injury on magnetic resonance imaging...
August 17, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28812078/evolution-of-the-linear-band-dispersion-of-monolayer-and-bilayer-germanene-on-cu-111
#11
Fengping Li, Wei Wei, Xingshuai Lv, Baibiao Huang, Ying Dai
The structural and electronic properties of germanene are always strongly modulated by the hybridization effects with metal substrates. In order to see what will happen when a buffer layer is introduced in-between germanene and metal substrates, we study the structural and electronic properties of the recently synthesized monolayer and bilayer germanene on Cu(111) though first-principles calculations. Our results show that the monolayer germanene on Cu(111) displays a nearly flat configuration and interface states form between the Ge pz and Cu sp-like states, with the Ge π states maintaining the Dirac character...
August 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28802249/high-resolution-mapping-of-chromatin-conformation-in-cardiac-myocytes-reveals-structural-remodeling-of-the-epigenome-in-heart-failure
#12
Manuel Rosa-Garrido, Douglas J Chapski, Anthony D Schmitt, Todd H Kimball, Elaheh Karbassi, Emma Monte, Enrique Balderas, Matteo Pellegrini, Tsai-Ting Shih, Elizabeth Soehalim, David Liem, Peipei Ping, Niels J Galjart, Shuxun Ren, Yibin Wang, Bing Ren, Thomas M Vondriska
BACKGROUND: Cardiovascular disease is associated with epigenomic changes in the heart; however, the endogenous structure of cardiac myocyte chromatin has never been determined. METHODS: To investigate the mechanisms of epigenomic function in the heart, genome-wide chromatin conformation capture (Hi-C) and DNA sequencing were performed in adult cardiac myocytes following development of pressure overload-induced hypertrophy. Mice with cardiac-specific deletion of CTCF (a ubiquitous chromatin structural protein) were generated to explore the role of this protein in chromatin structure and cardiac phenotype...
October 24, 2017: Circulation
https://www.readbyqxmd.com/read/28762166/accuracy-and-specific-value-of-cardiovascular-3d-models-in-pediatric-ct-angiography
#13
Matthias Hammon, Oliver Rompel, Hannes Seuss, Sven Dittrich, Michael Uder, Andrè Rüffer, Robert Cesnjevar, Nicole Ehret, Martin Glöckler
Computed tomography (CT)-angiography is routinely performed prior to catheter-based and surgical treatment in congenital heart disease. To date, little is known about the accuracy and advantage of different 3D-reconstructions in CT-data. Exact anatomical information is crucial. We analyzed 35 consecutive CT-angiographies of infants with congenital heart disease. All datasets are reconstructed three-dimensionally using volume rendering technique (VRT) and threshold-based segmentation (stereolithographic model, STL)...
December 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28684095/atrial-fibrillation-and-heart-failure-cause-or-effect
#14
REVIEW
Sandeep Prabhu, Aleksandr Voskoboinik, David M Kaye, Peter M Kistler
There are emerging epidemics of atrial fibrillation (AF) and heart failure in most developed countries, with a significant health burden. Due to many shared pathophysiological mechanisms, which facilitate the maintenance of each condition, AF and heart failure co-exist in up to 30% of patients. In the circumstance where known structural causes of heart failure (such as myocardial infarction) are absent, patients presenting with both conditions present a unique challenge, particularly as the temporal relationship of each condition can often remain elusive from the clinical history...
September 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28394258/large-scale-genome-wide-analysis-identifies-genetic-variants-associated-with-cardiac-structure-and-function
#15
MULTICENTER STUDY
Philipp S Wild, Janine F Felix, Arne Schillert, Alexander Teumer, Ming-Huei Chen, Maarten J G Leening, Uwe Völker, Vera Großmann, Jennifer A Brody, Marguerite R Irvin, Sanjiv J Shah, Setia Pramana, Wolfgang Lieb, Reinhold Schmidt, Alice V Stanton, Dörthe Malzahn, Albert Vernon Smith, Johan Sundström, Cosetta Minelli, Daniela Ruggiero, Leo-Pekka Lyytikäinen, Daniel Tiller, J Gustav Smith, Claire Monnereau, Marco R Di Tullio, Solomon K Musani, Alanna C Morrison, Tune H Pers, Michael Morley, Marcus E Kleber, Jayashri Aragam, Emelia J Benjamin, Joshua C Bis, Egbert Bisping, Ulrich Broeckel, Susan Cheng, Jaap W Deckers, Fabiola Del Greco M, Frank Edelmann, Myriam Fornage, Lude Franke, Nele Friedrich, Tamara B Harris, Edith Hofer, Albert Hofman, Jie Huang, Alun D Hughes, Mika Kähönen, Knhi Investigators, Jochen Kruppa, Karl J Lackner, Lars Lannfelt, Rafael Laskowski, Lenore J Launer, Margrét Leosdottir, Honghuang Lin, Cecilia M Lindgren, Christina Loley, Calum A MacRae, Deborah Mascalzoni, Jamil Mayet, Daniel Medenwald, Andrew P Morris, Christian Müller, Martina Müller-Nurasyid, Stefania Nappo, Peter M Nilsson, Sebastian Nuding, Teresa Nutile, Annette Peters, Arne Pfeufer, Diana Pietzner, Peter P Pramstaller, Olli T Raitakari, Kenneth M Rice, Fernando Rivadeneira, Jerome I Rotter, Saku T Ruohonen, Ralph L Sacco, Tandaw E Samdarshi, Helena Schmidt, Andrew S P Sharp, Denis C Shields, Rossella Sorice, Nona Sotoodehnia, Bruno H Stricker, Praveen Surendran, Simon Thom, Anna M Töglhofer, André G Uitterlinden, Rolf Wachter, Henry Völzke, Andreas Ziegler, Thomas Münzel, Winfried März, Thomas P Cappola, Joel N Hirschhorn, Gary F Mitchell, Nicholas L Smith, Ervin R Fox, Nicole D Dueker, Vincent W V Jaddoe, Olle Melander, Martin Russ, Terho Lehtimäki, Marina Ciullo, Andrew A Hicks, Lars Lind, Vilmundur Gudnason, Burkert Pieske, Anthony J Barron, Robert Zweiker, Heribert Schunkert, Erik Ingelsson, Kiang Liu, Donna K Arnett, Bruce M Psaty, Stefan Blankenberg, Martin G Larson, Stephan B Felix, Oscar H Franco, Tanja Zeller, Ramachandran S Vasan, Marcus Dörr
BACKGROUND: Understanding the genetic architecture of cardiac structure and function may help to prevent and treat heart disease. This investigation sought to identify common genetic variations associated with inter-individual variability in cardiac structure and function. METHODS: A GWAS meta-analysis of echocardiographic traits was performed, including 46,533 individuals from 30 studies (EchoGen consortium). The analysis included 16 traits of left ventricular (LV) structure, and systolic and diastolic function...
May 1, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28268489/predicting-seizures-in-untreated-temporal-lobe-epilepsy-using-point-process-nonlinear-models-of-heartbeat-dynamics
#16
G Valenza, A Romigi, L Citi, F Placidi, F Izzi, M Albanese, E P Scilingo, M G Marciani, A Duggento, M Guerrisi, N Toschi, R Barbieri
Symptoms of temporal lobe epilepsy (TLE) are frequently associated with autonomic dysregulation, whose underlying biological processes are thought to strongly contribute to sudden unexpected death in epilepsy (SUDEP). While abnormal cardiovascular patterns commonly occur during ictal events, putative patterns of autonomic cardiac effects during pre-ictal (PRE) periods (i.e. periods preceding seizures) are still unknown. In this study, we investigated TLE-related heart rate variability (HRV) through instantaneous, nonlinear estimates of cardiovascular oscillations during inter-ictal (INT) and PRE periods...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226663/predicting-seizures-in-untreated-temporal-lobe-epilepsy-using-point-process-nonlinear-models-of-heartbeat-dynamics
#17
G Valenza, A Romigi, L Citi, F Placidi, F Izzi, M Albanese, E P Scilingo, M G Marciani, A Duggento, M Guerrisi, N Toschi, R Barbieri, G Valenza, A Romigi, L Citi, F Placidi, F Izzi, M Albanese, E P Scilingo, M G Marciani, A Duggento, M Guerrisi, N Toschi, R Barbieri, M Guerrisi, F Izzi, F Placidi, A Romigi, E P Scilingo, A Duggento, M Albanese, N Toschi, M G Marciani, R Barbieri, G Valenza, L Citi
Symptoms of temporal lobe epilepsy (TLE) are frequently associated with autonomic dysregulation, whose underlying biological processes are thought to strongly contribute to sudden unexpected death in epilepsy (SUDEP). While abnormal cardiovascular patterns commonly occur during ictal events, putative patterns of autonomic cardiac effects during pre-ictal (PRE) periods (i.e. periods preceding seizures) are still unknown. In this study, we investigated TLE-related heart rate variability (HRV) through instantaneous, nonlinear estimates of cardiovascular oscillations during inter-ictal (INT) and PRE periods...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28126909/assessment-of-cardiac-fibrosis-a-morphometric-method-comparison-for-collagen-quantification
#18
COMPARATIVE STUDY
Julia Schipke, Christina Brandenberger, Alexandra Rajces, Martin Manninger, Alessio Alogna, Heiner Post, Christian Mühlfeld
Fibrotic remodeling of the heart is a frequent condition linked to various diseases and cardiac dysfunction. Collagen quantification is an important objective in cardiac fibrosis research; however, a variety of different histological methods are currently used that may differ in accuracy. Here, frequently applied collagen quantification techniques were compared. A porcine model of early stage heart failure with preserved ejection fraction was used as an example. Semiautomated threshold analyses were imprecise, mainly due to inclusion of noncollagen structures or failure to detect certain collagen deposits...
April 1, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28048455/we-ab-209-02-a-new-inverse-planning-framework-with-principle-based-modeling-of-inter-structural-dosimetric-tradeoffs
#19
H Liu, P Dong, L Xing
PURPOSE: Traditional radiotherapy inverse planning relies on the weighting factors to phenomenologically balance the conflicting criteria for different structures. The resulting manual trial-and-error determination of the weights has long been recognized as the most time-consuming part of treatment planning. The purpose of this work is to develop an inverse planning framework that parameterizes the inter-structural dosimetric tradeoff among with physically more meaningful quantities to simplify the search for a clinically sensible plan...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046949/su-f-t-516-effects-of-inter-fraction-organ-displacement-deformation-on-the-delivered-doses-to-the-heart-esophagus-and-lungs-in-patients-receiving-thoracic-radiotherapy
#20
J Hammers, J Matney, O Kaidar-Person, T Zagar, L Marks, S Das, P Mavroidis
PURPOSE: To quantitatively assess the effects of inter-fraction changes in organ shape and location on the delivered dose distribution to the organs at risk (OAR) in lung cancer patients. METHODS: This study analyzes treatment data of 10 patients, who were treated to 60Gy in 30 fractions. In each fraction a cone beam CT (CBCT) was acquired. Each CBCT was registered with the planning CT using deformable registration tools within MIM Software. The daily setup shifts were used to translate the planned dose distribution on the deformed planning CT...
June 2016: Medical Physics
keyword
keyword
78859
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"