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https://www.readbyqxmd.com/read/29041910/takotsubo-cardiomyopathy-in-a-patient-with-ileus-a-case-report
#1
Chen-Yu C Guo, Nan-Sung Chou
BACKGROUND: Takotsubo cardiomyopathy (TCM) is a form of stress-induced cardiomyopathy featured by the dilatation of the apex of the left ventricle during systole. Whereas the pathogenesis of this disorder is not well understood, it usually occurs after an emotional or physical stress such as acute asthma, surgery, chemotherapy, and stroke. However, its occurrence in ileus patients is rarely reported. We hereby report probably the first case of TCM after ileus in the literature and discuss its implications...
October 17, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29041194/highly-efficient-machining-of-non-circular-freeform-optics-using-fast-tool-servo-assisted-ultra-precision-turning
#2
Zexiao Li, Fengzhou Fang, Xiaodong Zhang, Xianlei Liu, Huimin Gao
Freeform optics has been regarded as the next generation of the optical components, especially those with non-circular apertures are playing an increasingly significant role in scanning field and specialized optical system. However, there still exist challenges to machine non-circular optical freeform surface. This paper is focused on highly efficiently generating freeform surfaces with optical surface quality by ultra-precision turning using a fast tool servo (FTS). A systematic strategy of machining smooth freeform surfaces with rectangular aperture is proposed in this paper...
October 16, 2017: Optics Express
https://www.readbyqxmd.com/read/29040936/chemical-profiling-and-quantification-of-dan-deng-tong-nao-capsule-using-ultra-high-performance-liquid-chromatography-coupled-with-high-resolution-hybrid-quadruple-orbitrap-mass-spectrometry
#3
Xiao-Jing Lv, Zhi Sun, Pei-Le Wang, Jing Yang, Tan-Ye Xu, Qing-Quan Jia, Da-Wei Li, Fang-Yi Su, Zhen-Feng Zhu, Jian Kang, Xiao-Jian Zhang
Dan-Deng-Tong-Nao capsule (DDTN) was a traditional Chinese medicine (TCM) formula, and has been widely used for the treatment of stroke clinically which caused by blood stasis. However, the bioactive substances and mechanism are unclear because of the complex compositions in DDTN. In this research, An ultra high-performance liquid chromatography (UHPLC) coupled with hybrid quadruple-orbitrap mass spectrometry (Q-Orbitrap MS) method was utilized to identify the chemical constituents of DDTN. In total, 102 compounds including diterpenes, lactones, flavonoids, and phenolic acids were identified by the accurate masses and fragmentation pathways, and 18 of them were unambiguously determined by comparison of reference standards...
October 7, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29040518/challenges-in-comparing-the-non-vitamin-k-antagonist-oral-anticoagulants-for-atrial-fibrillation-related-stroke-prevention
#4
A John Camm, Keith A A Fox, Eric Peterson
The aim of this review is to provide context for meta-analyses interpreting data from phase III stroke prevention studies of non-vitamin K antagonist oral anticoagulants (NOACs) in patients with non-valvular atrial fibrillation (NVAF). Differences between the four phase III NOAC stroke prevention studies in patients with NVAF (ROCKET AF, ARISTOTLE, RE-LY, and ENGAGE AF), their potential impact on outcomes, and inter-study differences were evaluated, as well as the potential role of real-world evidence in evaluating NOACs in this setting...
October 13, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29037463/in-vivo-bone-strain-and-finite-element-modeling-of-a-rhesus-macaque-mandible-during-mastication
#5
Olga Panagiotopoulou, José Iriarte-Diaz, Simon Wilshin, Paul C Dechow, Andrea B Taylor, Hyab Mehari Abraha, Sharifah F Aljunid, Callum F Ross
Finite element analysis (FEA) is a commonly used tool in musculoskeletal biomechanics and vertebrate paleontology. The accuracy and precision of finite element models (FEMs) are reliant on accurate data on bone geometry, muscle forces, boundary conditions and tissue material properties. Simplified modeling assumptions, due to lack of in vivo experimental data on material properties and muscle activation patterns, may introduce analytical errors in analyses where quantitative accuracy is critical for obtaining rigorous results...
September 1, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/29033030/how-to-use-stem-cells-for-repair-in-stroke-patients
#6
REVIEW
O Detante, C Rome, J Papassin
Regenerative cell therapy is a promising therapeutic strategy in neurology, most notably to improve stroke recovery. Although tolerability and feasibility have apparently been validated, many questions remain as to what is the best type of cells to use, the best route and the post-stroke delay for administration. Two main strategies have currently emerged: intravenous injection of mesenchymal stem cells with systemic trophic support; and intracerebral grafting of neural stem cells with brain repair effects at the lesion site...
October 12, 2017: Revue Neurologique
https://www.readbyqxmd.com/read/29029934/ability-of-pulse-wave-transit-time-to-detect-changes-in-stroke-volume-and-to-estimate-cardiac-output-compared-to-thermodilution-technique-in-isoflurane-anaesthetised-dogs
#7
H Sano, J P Chambers
OBJECTIVE: To evaluate the ability of pulse wave transit time (PWTT) to detect changes in stroke volume (SV) and to estimate cardiac output (CO) compared with the thermodilution technique in isoflurane-anaesthetized dogs. STUDY DESIGN: Prospective, experimental study. ANIMALS: Eight adult laboratory dogs. METHODS: The dogs were anaesthetized with isoflurane and mechanically ventilated. Reference CO (TDCO) was measured via a pulmonary artery catheter using the thermodilution technique and reference SV (TDSV) was calculated...
April 26, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29017429/rehabilitation-methods-for-reducing-shoulder-subluxation-in-post-stroke-hemiparesis-a-systematic-review
#8
Kamal Narayan Arya, Shanta Pandian, Vinod Puri
Background Shoulder subluxation is a common post-stroke complication affecting up to 80% of the stroke subjects. The pathomechanics at the skeletal level does not provide the structural base for the neural-motor recovery. The management of subluxed shoulder has always been a challenge, complicating the motor and functional recovery. Objective To review the available studies of rehabilitation interventions for reduction of subluxed shoulder and to explore the evidence for impact of subluxation on motor recovery...
October 11, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/28986865/nmda-receptors-in-the-central-nervous-system
#9
Kasper B Hansen, Feng Yi, Riley E Perszyk, Frank S Menniti, Stephen F Traynelis
NMDA-type glutamate receptors are ligand-gated ion channels that mediate a major component of excitatory neurotransmission in the central nervous system (CNS). They are widely distributed at all stages of development and are critically involved in normal brain functions, including neuronal development and synaptic plasticity. NMDA receptors are also implicated in the pathophysiology of numerous neurological and psychiatric disorders, such as ischemic stroke, traumatic brain injury, Alzheimer's disease, epilepsy, mood disorders, and schizophrenia...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28974567/relative-and-combined-prognostic-importance-of-on-treatment-mean-and-visit-to-visit-blood-pressure-variability-in-ontarget-and-transcend-patients
#10
Giuseppe Mancia, Helmut Schumacher, Michael Böhm, Josep Redon, Roland E Schmieder, Paolo Verdecchia, Peter Sleight, Koon Teo, Salim Yusuf
In 28 790 patients recruited for the ONTARGET (Ongoing Treatment Alone and in Combination With Ramipril Global End Point Trials) and TRANSCEND (Telmisartan Randomized Assessment Study in ACE Intolerant Subjects With Cardiovascular Disease) trials, we investigated the prognostic value for cardiovascular events (primary outcome) of (1)on-treatment visit-to-visit systolic blood pressure (SBP) variability versus mean SBP and (2) the 2 measures together. SBP variability was measured by the coefficient of variation (CV) of mean SBP to which it was unrelated...
October 3, 2017: Hypertension
https://www.readbyqxmd.com/read/28971520/isotropic-3d-cardiac-cine-mri-allows-efficient-sparse-segmentation-strategies-based-on-3d-surface-reconstruction
#11
Freddy Odille, Aurélien Bustin, Shufang Liu, Bailiang Chen, Pierre-André Vuissoz, Jacques Felblinger, Laurent Bonnemains
PURPOSE: Segmentation of cardiac cine MRI data is routinely used for the volumetric analysis of cardiac function. Conventionally, 2D contours are drawn on short-axis (SAX) image stacks with relatively thick slices (typically 8 mm). Here, an acquisition/reconstruction strategy is used for obtaining isotropic 3D cine datasets; reformatted slices are then used to optimize the manual segmentation workflow. METHODS: Isotropic 3D cine datasets were obtained from multiple 2D cine stacks (acquired during free-breathing in SAX and long-axis (LAX) orientations) using nonrigid motion correction (cine-GRICS method) and super-resolution...
October 2, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28968811/human-parahippocampal-cortex-supports-spatial-binding-in-visual-working-memory
#12
Neil Michael Dundon, Mohammad Zia Ul Haq Katshu, Bronson Harry, Daniel Roberts, E Charles Leek, Paul Downing, Ayelet Sapir, Craig Roberts, Giovanni d'Avossa
Studies investigating the functional organization of the medial temporal lobe (MTL) suggest that parahippocampal cortex (PHC) generates representations of spatial and contextual information used by the hippocampus in the formation of episodic memories. However, evidence from animal studies also implicates PHC in spatial binding of visual information held in short term, working memory. Here we examined a 46-year-old man (P.J.), after he had recovered from bilateral medial occipitotemporal cortex strokes resulting in ischemic lesions of PHC and hippocampal atrophy, and a group of age-matched healthy controls...
September 15, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28967593/measurement-of-cerebrovascular-reactivity-as-blood-oxygen-level-dependent-magnetic-resonance-imaging-signal-response-to-a-hypercapnic-stimulus-in-mechanically-ventilated-patients
#13
Lashmi Venkatraghavan, Julien Poublanc, Jay S Han, Olivia Sobczyk, Casey Rozen, Kevin Sam, James Duffin, David J Mikulis, Joseph A Fisher
BACKGROUND: Impaired cerebrovascular reactivity (CVR) is an important prognostic marker of stroke. Most measures of CVR lack (1) a reproducible vasoactive stimulus and (2) a high time and spatial resolution measure of cerebral blood flow (CBF), particularly for mechanically ventilated patients. The aim of our study was to investigate the feasibility of measuring CVR using sequential gas delivery circuit and gas blender for precise targeting of end-tidal PCO2 (PetCO2), and blood oxygen level-dependent magnetic resonance imaging (BOLD-MRI) signal as a surrogate of CBF, in mechanically ventilated patients...
September 26, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28962662/shared-decision-making-for-stroke-prevention-in-atrial-fibrillation-study-protocol-for-a-randomized-controlled-trial
#14
Marleen Kunneman, Megan E Branda, Peter A Noseworthy, Mark Linzer, Bruce Burnett, Sara Dick, Gabriela Spencer-Bonilla, Cara A Fernandez, Haeshik Gorr, Mike Wambua, Shelly Keune, Claudia Zeballos-Palacios, Ian Hargraves, Nilay D Shah, Victor M Montori
BACKGROUND: Nonvalvular atrial fibrillation (AF) is a common ongoing health problem that places patients at risk of stroke. Whether and how a patient addresses this risk depends on each patient's goals, context, and values. Consequently, leading cardiovascular societies recommend using shared decision making (SDM) to individualize antithrombotic treatment in patients with AF. The aim of this study is to assess the extent to which the ANTICOAGULATION CHOICE conversation tool promotes high-quality SDM and influences anticoagulation uptake and adherence in patients with AF at risk of strokes...
September 29, 2017: Trials
https://www.readbyqxmd.com/read/28950278/yakult-intestinal-flora-scan-a-novel-culture-independent-analytical-method-for-detection-of-bacteria-in-the-bloodstream
#15
Hirokazu Tsuji, Koji Nomoto
We have developed a highly sensitive microbial analytical system, the Yakult Intestinal Flora-SCAN (YIF-SCAN), based on reverse transcription-quantitative PCR, to quantify the intestinal microbiota. Targeting ribosomal RNA "molecules," which are present in abundant copies in the microorganisms, YIF-SCAN is at least hundreds of times more sensitive (detection limits: 102-3 cells/g feces, 1 cell/mL blood) than conventional DNA-based methods, and hence enables highly sensitive and precise detection of viable microorganisms in various types of samples, such as stools, blood etc...
2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28948480/delineation-of-the-ischemic-stroke-lesion-based-on-watershed-and-relative-fuzzy-connectedness-in-brain-mri
#16
Asit Subudhi, Subhranshu Jena, Sukanta Sabut
Precise segmentation of stroke lesions from brain magnetic resonance (MR) images poses a challenging task in automated diagnosis. In this paper, we proposed a new method called watershed-based lesion segmentation algorithm (WLSA), which is a novel intensity-based segmentation technique used to delineate infarct lesion in diffusion-weighted imaging (DWI) MR images of the brain. The algorithm was tested on a series of 142 real-time images collected from different stroke patients reported at IMS and SUM Hospital...
September 26, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28913677/thus-far-and-no-further-should-diastolic-hypotension-limit-intensive-blood-pressure-lowering
#17
REVIEW
Marcel Ruzicka, Cedric Edwards, Brendan McCormick, Swapnil Hiremath
Intensive blood pressure lowering to systolic blood pressure thresholds of less than 120 mmHg is making a slow comeback with the publication of trials supporting its benefit, especially in lowering stroke and congestive heart failure. At the same time, there is an increasing awareness of the prevalence and risk of diastolic hypotension, especially at levels of less than 60 mmHg, with support for the existence of a J-curve coming from post hoc analyses of trials and epidemiological data from large cohort studies...
September 14, 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28910298/adult-hippocampal-neurogenesis-poststroke-more-new-granule-cells-but-aberrant-morphology-and-impaired-spatial-memory
#18
Florus Woitke, Mihai Ceanga, Max Rudolph, Fanny Niv, Otto W Witte, Christoph Redecker, Albrecht Kunze, Silke Keiner
Stroke significantly stimulates neurogenesis in the adult dentate gyrus, though the functional role of this postlesional response is mostly unclear. Recent findings suggest that newborn neurons generated in the context of stroke may fail to correctly integrate into pre-existing networks. We hypothesized that increased neurogenesis in the dentate gyrus following stroke is associated with aberrant neurogenesis and impairment of hippocampus-dependent memory. To address these questions we used the middle cerebral artery occlusion model (MCAO) in mice...
2017: PloS One
https://www.readbyqxmd.com/read/28904531/potential-therapeutic-mechanisms-and-tracking-of-transplanted-stem-cells-implications-for-stroke-treatment
#19
REVIEW
Yanhong Zhang, Honghong Yao
Stem cell therapy is a promising potential therapeutic strategy to treat cerebral ischemia in preclinical and clinical trials. Currently proposed treatments for stroke employing stem cells include the replacement of lost neurons and integration into the existing host circuitry, the release of growth factors to support and promote endogenous repair processes, and the secretion of extracellular vesicles containing proteins, noncoding RNA, or DNA to regulate gene expression in recipient cells and achieve immunomodulation...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28900364/performance-characteristics-of-lipoprotein-associated-phospholipase-a2-activity-assay-on-the-dimension-vista-analyser-and-preliminary-study-of-a-healthy-italian-population
#20
Alessandro De Stefano, Liliana Mannucci, Renato Massoud, Sergio Bernardini, Claudio Cortese
INTRODUCTION: Lipoprotein-associated phospholipase A2 (Lp-PLA2) is a marker of vascular inflammation associated with coronary heart disease and stroke. We evaluated analytical performance of the PLAC® Activity Test on Siemens Dimension Vista® 1500 analyzer and measured Lp-PLA2 activity in Italian adults to establish reference intervals (RIs) and evaluate correlation with circulating lipids and age. MATERIALS AND METHODS: The evaluation protocol consisted of precision, linearity, sensitivity, method comparison, substrate depletion ("hook") effect and interference assessment...
October 15, 2017: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
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