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https://www.readbyqxmd.com/read/28329845/spatiotemporal-progression-and-remission-of-lesions-in-the-rat-brain-following-acute-intoxication-with-diisopropylfluorophosphate
#1
Sílvia Sisó, Brad A Hobson, Danielle J Harvey, Donald A Bruun, Douglas J Rowland, Joel R Garbow, Pamela J Lein
Similar to organophosphate (OP) nerve agents, diisopropylfluorophosphate (DFP) rapidly and irreversibly inhibits acetylcholinesterase, leading to convulsions that can progress to status epilepticus (SE). However, in contrast to the OP nerve agents, the long-term consequences of DFP-induced SE are not well known. Thus, we characterized the spatiotemporal profile of neuropathology during the first two months following acute DFP intoxication. Adult, male Sprague Dawley rats administered pyridostigmine bromide (0...
March 7, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28329138/small-intestinal-submucosa-tricuspid-valve-tube-graft-shows-growth-potential-remodelling-and-physiological-valve-function-in-a-porcine-model%C3%A2
#2
Diana M Ropcke, Christine Ilkjaer, Marcell J Tjornild, Soren N Skov, Steffen Ringgaard, Vibeke E Hjortdal, Sten L Nielsen
OBJECTIVES: Tricuspid valve reconstruction using small intestinal submucosal extracellular matrix (ECM) designed as a tube graft is possible in severe valve pathology. Using cardiac magnetic resonance imaging (MRI) and digital photograph imaging, valves were evaluated after 6 months in a porcine model. METHODS: Ten 60 kg pigs received a tricuspid valve tube graft. A baseline MRI was performed after 2 weeks ( n  = 8). A follow-up MRI was performed in three of five 6 months' survivors to assess function and haemodynamics of the tricuspid tube graft...
February 27, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28329100/long-term-cardiovascular-changes-following-creation-of-arteriovenous-fistula-in-patients-with-end-stage-renal-disease
#3
Yogesh N V Reddy, Masaru Obokata, Patrick G Dean, Vojtech Melenovsky, Karl A Nath, Barry A Borlaug
Aims: Short-term studies have reported left ventricular (LV) dilatation following surgical creation of arteriovenous fistulas (AVF) or arteriovenous grafts (AVGs), but chronic cardiac structural and functional changes have not been examined or related to clinical outcomes following AVF/AVG. We sought to characterize the long-term changes in cardiac structure and function in patients undergoing shunt creation for haemodialysis. Methods and results: A retrospective analysis was performed of patients undergoing echocardiography before and after surgical AVF/AVG creation for the initiation of haemodialysis...
March 6, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28329054/whole-heart-detailed-and-quantitative-anatomy-myofibre-structure-and-vasculature-from-x-ray-phase-contrast-synchrotron-radiation-based-micro-computed-tomography
#4
Anna Gonzalez-Tendero, Chong Zhang, Vedrana Balicevic, Rubén Cárdenes, Sven Loncaric, Constantine Butakoff, Bruno Paun, Anne Bonnin, Patricia Garcia-Cañadilla, Emma Muñoz-Moreno, Eduard Gratacós, Fatima Crispi, Bart Bijnens
Background: While individual cardiac myocytes only have a limited ability to shorten, the heart efficiently pumps a large volume-fraction thanks to a cell organization in a complex 3D fibre structure. Subclinical subtle cardiac structural remodelling is often present before symptoms arise. Understanding and early detection of these subtle changes is crucial for diagnosis and prevention. Additionally, personalized computational modelling requires knowledge on the multi-scale structure of the whole heart and vessels...
March 15, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28327144/computational-medical-imaging-and-hemodynamics-framework-for-functional-analysis-and-assessment-of-cardiovascular-structures
#5
REVIEW
Kelvin K L Wong, Defeng Wang, Jacky K L Ko, Jagannath Mazumdar, Thu-Thao Le, Dhanjoo Ghista
Cardiac dysfunction constitutes common cardiovascular health issues in the society, and has been an investigation topic of strong focus by researchers in the medical imaging community. Diagnostic modalities based on echocardiography, magnetic resonance imaging, chest radiography and computed tomography are common techniques that provide cardiovascular structural information to diagnose heart defects. However, functional information of cardiovascular flow, which can in fact be used to support the diagnosis of many cardiovascular diseases with a myriad of hemodynamics performance indicators, remains unexplored to its full potential...
March 21, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28325106/impact-of-age-on-left-ventricular-geometry-and-diastolic-function-in-elderly-patients-with-treated-hypertension
#6
Ayumi Toba, Taro Kariya, Rie Aoyama, Taizo Ishiyama, Yusuke Tsuboko, Kazuhiro Takeda, Hajime Fujimoto, Kentaro Shimokado, Kazumasa Harada
PURPOSE: Left ventricular (LV) remodelling is observed in numerous patients with hypertension and is a principal cause of heart failure in elderly patients. The aim of this study was to determine the relationships between age and structural/functional LV remodelling observed in elderly hypertensive patients. METHODS: A total of 557 elderly hypertensive patients (mean age: 74.0 ± 8.6 years) with preserved LV systolic function underwent echocardiography and 24-hour blood pressure (BP) measurement...
March 22, 2017: Blood Pressure
https://www.readbyqxmd.com/read/28324981/hemodynamic-determinants-and-ventriculo-arterial-coupling-are-sex-associated-in-heart-failure-patients
#7
Peter L Kerkhof, Guy R Heyndrickx, John K-J Li
End-systolic volume (ESV) and end-diastolic volume (EDV) are key parameters in the analysis of left ventricular (LV) function, and the study of cardiac remodeling. The volume regulation graph (VRG) relates these fundamental determinants, and permits convenient stratification for clinically relevant covariates. This contribution analyzes sex-associated differences in hemodynamic parameters for 197 heart failure (HF) patients, evaluated by biplane ventriculography, in combination with arterial pressure. We calculated LV parameters such as stroke volume (SV), cardiac output (CO), ESV, EDV, ejection fraction (EF), end-systolic elastance (Emax), besides arterial parameters: effective arterial elastance (Ea), elastance ratio (the coupling index k), peripheral resistance (Rs), pulse pressure (PP), and arterial compliance (C), all normalized for body surface area when appropriate...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28323857/myocardial-ischemia-reperfusion-enhances-transcriptional-expression-of-endothelin-1-and-vasoconstrictor-etb-receptors-via-the-protein-kinase-mek-erk1-2-signaling-pathway-in-rat
#8
Gry Freja Skovsted, Lars Schack Kruse, Lukas Adrian Berchtold, Anne-Sofie Grell, Karin Warfvinge, Lars Edvinsson
BACKGROUND: Coronary artery remodelling and vasospasm is a complication of acute myocardial ischemia and reperfusion. The underlying mechanisms are complex, but the vasoconstrictor peptide endothelin-1 is suggested to have an important role. This study aimed to determine whether the expression of endothelin-1 and its receptors are regulated in the myocardium and in coronary arteries after experimental ischemia-reperfusion. Furthermore, we evaluated whether treatment with a specific MEK1/2 inhibitor, U0126, modified the expression and function of these proteins...
2017: PloS One
https://www.readbyqxmd.com/read/28323379/effects-of-short-term-levothyroxine-therapy-on-myocardial-injuries-in-patients-with-severe-overt-hypothyroidism-evidence-from-a-cardiac-mri-study
#9
Xia Gao, Zhe Chen, Min Liu, Yu-Mei Jia, Ning Yang, Zhi Yao, Xiao-Meng Feng, Yuan Xu, Guang Wang
PURPOSE: To investigate using magnetic resonance imaging (MRI) myocardial injuries and cardiac function in patients with newly diagnosed severe primary overt hypothyroidism (HT) before and after achieving euthyroidism by short-term levothyroxine treatment. Levothyroxine treatment improves cardiovascular performance and ventricular remodeling in patients with HT, but diffuse myocardial injuries induced by HT are difficult to detect clinically. MATERIALS AND METHODS: Myocardial longitudinal relaxation time (T1 ) mapping using the modified Look-Locker inversion-recovery (MOLLI) sequences at 3...
March 21, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28322201/association-of-cardiac-galectin-3-expression-myocarditis-and-fibrosis-in-chronic-chagas-disease-cardiomyopathy
#10
Bruno Solano de Freitas Souza, Daniela Nascimento Silva, Rejane Hughes Carvalho, Gabriela Louise de Almeida Sampaio, Bruno Diaz Paredes, Luciana Aragão França, Carine Machado Azevedo, Juliana Fraga Vasconcelos, Cassio Santana Meira, Paulo Chenaud Neto, Simone Garcia Macambira, Kátia Nunes da Silva, Kyan James Allahdadi, Fabio Tavora, João David de Souza Neto, Ricardo Ribeiro Dos Santos, Milena Botelho Pereira Soares
Chronic Chagas disease cardiomyopathy, caused by Trypanosoma cruzi infection, is a major cause of heart failure in Latin America. Galectin-3 (Gal-3) has been linked to cardiac remodeling and poor prognosis in heart failure of different etiologies. Herein, we investigated the involvement of Gal-3 in the disease pathogenesis and its role as a target for disease intervention. Gal-3 expression in mouse hearts was evaluated during T. cruzi infection by confocal microscopy and flow cytometry analysis, showing a high expression in macrophages, T cells, and fibroblasts...
March 16, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28321644/vinpocetine-attenuates-pathological-cardiac-remodeling-by-inhibiting-cardiac-hypertrophy-and-fibrosis
#11
Mei-Ping Wu, Yi-Shuai Zhang, Xiangbin Xu, Qian Zhou, Jian-Dong Li, Chen Yan
PURPOSE: Pathological cardiac remodeling, characterized by cardiac hypertrophy and fibrosis, is a pathological feature of many cardiac disorders that leads to heart failure and cardiac arrest. Vinpocetine, a derivative of the alkaloid vincamine, has been used for enhancing cerebral blood flow to treat cognitive impairment. However, its role in pathological cardiac remodeling remains unknown. The aim of this study is to examine the effect of vinpocetine on pathological cardiac remodeling induced by chronic stimulation with angiotensin II (Ang II)...
March 20, 2017: Cardiovascular Drugs and Therapy
https://www.readbyqxmd.com/read/28321539/secoisolariciresinol-diglucoside-attenuates-cardiac-hypertrophy-and-oxidative-stress-in-monocrotaline-induced-right-heart-dysfunction
#12
Stephanie Puukila, Rafael Oliveira Fernandes, Patrick Türck, Cristina Campos Carraro, Jéssica Hellen Poletto Bonetto, Bruna Gazzi de Lima-Seolin, Alex Sander da Rosa Araujo, Adriane Belló-Klein, Douglas Boreham, Neelam Khaper
Pulmonary arterial hypertension (PAH) occurs when remodeling of pulmonary vessels leads to increased pulmonary vascular resistance resulting in increased pulmonary arterial pressure. Increased pulmonary arterial pressure results in right ventricle hypertrophy and eventually heart failure. Oxidative stress has been implicated in the pathogenesis of PAH and may play a role in the regulation of cellular signaling involved in cardiac response to pressure overload. Secoisolariciresinol diglucoside (SDG), a component from flaxseed, has been shown to reduce cardiac oxidative stress in various pathophysiological conditions...
March 20, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28320744/angiotensin-converting-enzyme-inhibitors-and-angiotensin-ii-receptor-blockers-are-associated-with-improved-outcome-but-do-not-prevent-new-onset-atrial-fibrillation-after-acute-myocardial-infarction
#13
Gorav Batra, Lars Lindhagen, Pontus Andell, David Erlinge, Stefan James, Jonas Spaak, Jonas Oldgren
BACKGROUND: Treatment with renin-angiotensin system (RAS) inhibitors might restrain the structural/electrical remodeling associated with atrial fibrillation (AF). Limited evidence exists regarding the potential benefits of RAS inhibition post-acute myocardial infarction (AMI) in patients with AF. This study sought to assess the association between RAS inhibition and all-cause mortality and new-onset AF in patients with/without congestive heart failure (CHF) post-AMI. METHODS AND RESULTS: Patients hospitalized for AMI between 2006 and 2012 were identified in Swedish registries...
March 20, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28319168/targeting-chronic-cardiac-remodeling-with-cardiac-progenitor-cells-in-a-murine-model-of-ischemia-reperfusion-injury
#14
Janine C Deddens, Dries A Feyen, Peter-Paul Zwetsloot, Maike A Brans, Sailay Siddiqi, Linda W van Laake, Pieter A Doevendans, Joost P Sluijter
BACKGROUND: Translational failure for cardiovascular disease is a substantial problem involving both high research costs and an ongoing lack of novel treatment modalities. Despite the progress already made, cell therapy for chronic heart failure in the clinical setting is still hampered by poor translation. We used a murine model of chronic ischemia/reperfusion injury to examine the effect of minimally invasive application of cardiac progenitor cells (CPC) in cardiac remodeling and to improve clinical translation...
2017: PloS One
https://www.readbyqxmd.com/read/28317477/circulating-biomarkers-of-collagen-metabolism-and-prognosis-of-heart-failure-with-reduced-or-mid-range-ejection-fraction
#15
Joana Moura Ferreira, Sara Moura Ferreira, Maria João Ferreira, Inês Falcão-Pires
BACKGROUND: Change in the architecture and composition of cardiac extracellular matrix is a key element in adverse cardiac remodeling that occurs during heart failure. Most of the times, the result is the development of fibrosis, which has a huge impact on the pathophysiology and clinical outcomes of heart failure syndromes. Several molecules related to collagen metabolism detectable in the blood have been proposed as biomarkers of myocardial fibrosis. Despite concerns regarding the true ability of these biomarkers to reflect quantitative and qualitative changes in myocardial collagen, a growing body of evidence suggests that they may play a potential role in several aspects of heart failure management...
March 17, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28316086/cardiac-fibrosis-in-the-ageing-heart-contributors-and-mechanisms
#16
Lu Lu, Jingbin Guo, Yue Hua, Kevin Huang, Ruth Magaye, Jake Cornell, Darren J Kelly, Christopher Reid, Danny Liew, Yingchun Zhou, Aihua Chen, Wei Xiao, Qiang Fu, Bing Hui Wang
Cardiac fibrosis refers to an excessive deposition of extracellular matrix (ECM) in cardiac tissue. Fibrotic tissue is stiffer and less compliant, resulting in subsequent cardiac dysfunction and heart failure. Cardiac fibrosis in the ageing heart may involve activation of fibrogenic signalling and inhibition of anti-fibrotic signalling, leading to an imbalance of ECM turnover. Excessive accumulation of ECM such as collagen in older patients contributes to progressive ventricular dysfunction. Overexpression of collagen is derived from various sources, including higher levels of fibrogenic growth factors, proliferation of fibroblasts and cellular trans-differentiation...
March 18, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28315072/direct-myosin-activation-by-omecamtiv-mecarbil-for-heart-failure-with-reduced-ejection-fraction
#17
Mitchell A Psotka, John R Teerlink
Myosin is the indispensable molecular motor that utilizes chemical energy to produce force for contraction within the cardiac myocyte. Myosin activity is gated by intracellular calcium levels which are regulated by multiple upstream signaling cascades that can be altered for clinical utility using inotropic medications. In contrast to clinically available cardiac inotropes, omecamtiv mecarbil is a novel direct myosin activator developed to augment left ventricular systolic function without the undesirable secondary effects of altered calcium homeostasis...
March 18, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28314377/the-effects-of-scaffold-remnants-in-decellularized-tissue-engineered-cardiovascular-constructs-on-the-recruitment-of-blood-cells
#18
Bart Sanders, Anita Driessen-Mol, Carlijn Bouten, Frank Baaijens
Decellularized tissue engineered heart valves (DTEHVs) showed remarkable results in translational animal models, leading to recellularization within hours after implantation. This is crucial to enable tissue remodeling. To investigate if the presence of scaffold remnants prior to implantation is responsible for the fast recellularization of DTEHVs, an in vitro mesofluidic system was used. Human granulocyte and agranulocyte fractions were isolated, stained, brought back in suspension, and implemented in the system...
March 17, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28302203/-changes-in-serum-chromogranin-a-and-urotensin-ii-levels-in-children-with-chronic-heart-failure
#19
Yao-Yao Cheng, Jin-Dou An, Song Feng, Wei Ge
OBJECTIVE: To examine the changes in serum chromogranin A (CgA) and urotensin II (U II) levels in children with chronic heart failure (CHF) and their clinical significance. METHODS: A total of 58 children with CHF, among whom 17 had endocardial fibroelastosis (EFE) and 41 had dilated cardiomyopathy (DCM), were selected as CHF group, and 20 healthy children were selected as control group. Serum levels of CgA and U II were measured using enzyme-linked immunosorbent assay, and the level of N-terminal pro-brain natriuretic peptide (NT-proBNP) was determined by bi-directional lateral flow immunoassay...
March 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28301315/time-and-age-dependent-decrease-of-nt-probnp-after-septal-myectomy-in-hypertrophic-obstructive-cardiomyopathy
#20
Hao Cui, Xi Wu, Shuiyun Wang, Bing Tang, Changsheng Zhu, Haibo Chen, Xiaohui Zhou, Rong Wu, Qinjun Yu, Xiaohong Huang
BACKGROUND: NT-proBNP level is a predictive factor in hypertrophic cardiomyopathy patients, in which left ventricular outflow tract obstruction contributes to an increased NT-proBNP level. However, studies regarding the influence of septal myectomy on NT-proBNP level in hypertrophic obstructive cardiomyopathy are lacking. METHODS: One hundred and eighty-two patients who underwent septal myectomy in Fuwai Hospital from May 2011 to March 2016 and were included in the present study...
March 16, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
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