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https://www.readbyqxmd.com/read/28545282/-electrocardiogram-characteristics-of-patients-with-ventricular-arrhythmia-originating-from-the-distal-great-cardiac-vein
#1
R L Zheng, D P Zhou, J X Lin, Y C Li, J Li, J Li, R P Yin, J F Lin
Objective: To explore the electrocardiographic characteristics of patients with idiopathic ventricular arrhythmias (VAs) originating from different portions of distal great cardiac veins (DGCV). Methods: The study included 49 patients underwent successful RFCA of premature ventricular complex(PVCs)/ventricular tachycardia(VT) from different portions of the DGCV in our department from July 2009 to March 2016. The surface 12-lead electrocardiogram (ECG) and intraventricular ablation mapping features were analyzed...
April 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28542917/characterizing-the-performance-of-pipe-bombs
#2
Jimmie C Oxley, James L Smith, Evan T Bernier, Fredrick Sandstrom, Gregory G Weiss, Gunther W Recht, David Schatzer
Pipe bombs of steel or PVC fragment in reproducible patterns when similarly configured. The power of the explosion correlates with number, mass, and size of the fragments recovered, where a large number of small, low-mass fragments indicate a high-power event and vice versa. In discussing performance, describing pipe fragmentation pattern by fragment weight distribution mapping (FWDM) or fragment surface area distribution mapping (FSADM) was useful. When fillers detonated, detonation velocities of ~4.4 mm/μs were measured...
May 24, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28542320/the-ik1-kir2-1-channel-agonist-zacopride-prevents-and-cures-acute-ischemic-arrhythmias-in-the-rat
#3
Xu-Wen Zhai, Li Zhang, Yun-Fei Guo, Ying Yang, Dong-Ming Wang, Yan Zhang, Pan Li, Yi-Fan Niu, Qi-Long Feng, Bo-Wei Wu, Ji-Min Cao, Qing-Hua Liu
Arrhythmogenesis in acute myocardial infarction (MI) is associated with depolarization of resting membraine potential (RMP) and decrease of inward rectifier potassium current (IK1) in cardiomyocytes. However, clinical anti-arrhythmic agents that primarily act on RMP by enhancing the IK1 channel are not currently available. We hypothesized that zacopride, a selective and moderate agonist of the IK1/Kir2.1 channels, prevents and cures acute ischemic arrhythmias. To test this viewpoint, adult Sprague-Dawley (SD) rats were subjected to MI by ligating the left main coronary artery...
2017: PloS One
https://www.readbyqxmd.com/read/28538759/comparison-of-two-central-venous-pressure-control-strategies-to-prevent-atrial-fibrillation-after-coronary-artery-bypass-grafting
#4
Mario Augusto Cray da Costa, Wesley Lirani, Ana Caroline Wippich, Luana Lopes, Eduardo de Souza Tolentino, Beatriz Zampar, Marcelo Derbli Schafranski
Background: Atrial fibrillation (AF) takes place in 10-40% of patients undergoing coronary artery bypass grafting (CABG), and increases cardiovascular mortality. Enlargement of atrial chambers is associated with increased AF incidence, so patients with higher central venous pressure (CVP) are expected to have larger atrial distension, which increases AF incidence. Objective: To compare post-CABG AF incidence, following two CVP control strategies. Methods: Interventional, randomized, controlled clinical study...
April 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28535320/effectiveness-of-a-labor-cervical-exam-model-in-family-medicine-and-ob-gyn-residents
#5
Joshua F Nitsche, Nora F Fino, Jose M Palomo, Abraham Portillo Perdomo, Brian C Brost
BACKGROUND AND OBJECTIVES: Labor cervical exam accuracy is an essential skill for family medicine and OB-GYN residents to master. To determine the effectiveness of simulation on labor cervical exam training, family medicine and OB-GYN residents were trained using a self-constructed PVC pipe-based cervical exam model during a short and intensive simulation workshop or "boot camp." METHODS: A task trainer was constructed that allows for the blind examination of cervical dilation and effacement...
May 2017: Family Medicine
https://www.readbyqxmd.com/read/28532077/preparation-of-robust-braid-reinforced-poly-vinyl-chloride-ultrafiltration-hollow-fiber-membrane-with-antifouling-surface-and-application-to-filtration-of-activated-sludge-solution
#6
Zhuang Zhou, Saeid Rajabzadeh, Lifeng Fang, Taro Miyoshi, Yuriko Kakihana, Hideto Matsuyama
Braid-reinforced hollow fiber membranes with high mechanical properties and considerable antifouling surface were prepared by blending poly(vinyl chloride) (PVC) with poly(vinyl chloride-co-poly(ethylene glycol) methyl ether methacrylate) (poly(VC-co-PEGMA)) copolymer via non-solvent induced phase separation (NIPS). The tensile strength of the braid-reinforced PVC hollow fiber membranes were significantly larger than those of previously reported various types of PVC hollow fiber membranes. The high interfacial bonding strength indicated the good compatibility between the coating materials and the surface of polyethylene terephthalate (PET)-braid...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28527864/effect-of-the-medium-s-density-on-the-hydrocyclonic-separation-of-waste-plastics-with-different-densities
#7
Shuangcheng Fu, Yong Fang, Huixin Yuan, Wanjiang Tan, Yiwen Dong
Hydrocyclones can be applied to recycle waste plastics with different densities through separating plastics based on their differences in densities. In the process, the medium density is one of key parameters and the value of the medium's density is not just the average of the density of two kinds of plastics separated. Based on the force analysis and establishing the equation of motion of particles in the hydrocyclone, a formula to calculate the optimum separation medium density has been deduced. This value of the medium's density is a function of various parameters including the diameter, density, radial position and tangential velocity of particles, and viscosity of the medium...
May 17, 2017: Waste Management
https://www.readbyqxmd.com/read/28522844/high-performance-pvc-gel-for-adaptive-micro-lenses-with-variable-focal-length
#8
Jin Woo Bae, Eun-Jae Shin, Jaeu Jeong, Dong-Soo Choi, Jong Eun Lee, Byeong Uk Nam, Liwei Lin, Sang-Youn Kim
This paper presents a bio-inspired adaptive micro-lens with electrically tunable focus made of non-ionic high-molecular-weight polyvinyl chloride (PVC) gel. The optical device mimics the design of the crystalline lens and ciliary muscle of the human eye. It consists of a plano-convex PVC gel micro-lens on Indium Tin Oxide (ITO) glass, confined with an annular electrode operating as an artificial ciliary muscle. Upon electrical activation, the electroactive adhesive force of the PVC gel is exerted on the annular anode electrode, which reduces the sagittal height of the plano-convex PVC gel lens, resulting in focal length variation of the micro-lens...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28511314/-determination-of-cadmium-in-human-urine-by-colloidal-gold-immunochromatographic-assay
#9
G Y Fu, J Gong, X X Leng
Objective: To establish the method of colloidal gold immunochrom atographic assay for detecting cadmium ions rapidly. Methods: The anti-cadmium ion monoclonal antibody-gold conjugate was labeled on the binding pad, cadmium ion hapten and goat anti-mouse IgG were coated on nitrocellulose membrane as the detection line (T line) and quality control line (C line) respectively. The sample pad, colloidal gold bonding pad, nitrocellulose membrane and absorption pad were orderly assembled on the PVC board to cut into a test paper strip...
March 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/28511057/mapping-smokeless-powder-residue-on-pvc-pipe-bomb-fragments-using-total-vaporization-solid-phase-microextraction
#10
Dana Bors, John Goodpaster
Quantitating post-blast explosive residue is not a common practice in crime labs as it is typically not legally relevant. There is value in quantitation, however, if the distribution of residues on Improvised Explosive Devices (IEDs) can help guide future sample collection and/or method development. Total vaporization solid phase microextraction gas chromatography mass spectrometry (TV-SPME/GC/MS) was used to quantify residues of double-base smokeless powder (DBSP), which includes nitroglycerin (NG), diphenylamine (DPA), and ethyl centralite (EC) on post-blast PVC pipe bomb fragments...
April 14, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28509708/pvcs-pvc-induced-cardiomyopathy-and-the-role-of-catheter-ablation
#11
Esseim Sharma, Karuppiah Arunachalam, Mengyang Di, Antony Chu, Abhishek Maan
Premature ventricular contractions (PVCs) are common arrhythmias noticed in the clinical setting because of premature depolarization of the ventricular myocytes. Although often thought to be reflective of underlying disease rather than intrinsically harmful, PVCs have recently been linked with worse outcomes in patients without significant cardiac disease. Long-term exposure to a high PVC burden can lead to the development of PVC-induced cardiomyopathy. The pathogenesis of this condition is poorly understood at the current time...
June 2017: Critical Pathways in Cardiology
https://www.readbyqxmd.com/read/28505511/novel-electrodialysis-cation-exchange-membrane-prepared-by-2-acrylamido-2-methylpropane-sulfonic-acid-heavy-metal-ions-removal
#12
M Nemati, S M Hosseini, M Shabanian
In the present work a novel heterogeneous cation exchange membrane (CEM) composed of poly vinyl chloride (PVC) and 2-acrylamido-2-methylpropane sulfonic acid based hydrogel (AMAH) was prepared. The membranes were fabricated with different fractions of AMAH to optimize the performance in desalination. The hydrogel was characterized by FT-IR to prove the successful synthesis. The membrane properties such as permselectivity, ionic permeability, flux, water content, electrical resistance, morphology, contact angle and dimensional stability were evaluated...
May 1, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28502601/recycling-of-spent-lithium-ion-battery-with-polyvinyl-chloride-by-mechanochemical-process
#13
Meng-Meng Wang, Cong-Cong Zhang, Fu-Shen Zhang
In the present study, cathode materials (C/LiCoO2) of spent lithium-ion batteries (LIBs) and waste polyvinyl chloride (PVC) were co-processed via an innovative mechanochemical method, i.e. LiCoO2/PVC/Fe was co-grinded followed by water-leaching. This procedure generated recoverable LiCl from Li by the dechlorination of PVC and also generated magnetic CoFe4O6 from Co. The effects of different additives (e.g. alkali metals, non-metal oxides, and zero-valent metals) on (i) the conversion rates of Li and Co and (ii) the dechlorination rate of PVC were investigated, and the reaction mechanisms were explored...
May 11, 2017: Waste Management
https://www.readbyqxmd.com/read/28500731/alternative-plasticizer-4-cyclohexene-1-2-dicarboxylic-acid-dinonyl-ester-for-blood-containers-with-protective-effects-on-red-blood-cells-and-improved-cold-resistance
#14
Yuki Morishita, Yusuke Nomura, Chie Fukui, Ayano Fujisawa, Kayo Watanabe, Hideo Fujimaki, Hidefumi Kumada, Kaoru Inoue, Tomomi Morikawa, Miwa Takahashi, Tsuyoshi Kawakami, Hideyuki Sakoda, Tomokazu Mukai, Toshiyasu Yuba, Ken-Ichi Inamura, Akito Tanoue, Ken-Ichi Miyazaki, Ung-Il Chung, Kumiko Ogawa, Midori Yoshida, Yuji Haishima
Di (2-ethylhexyl) phthalate (DEHP), a typical plasticizer used for polyvinyl chloride (PVC), is eluted from PVC-made blood containers and protects against red blood cell (RBC) hemolysis. However, concerns have arisen regarding the reproductive and developmental risks of DEHP in humans, and the use of alternative plasticizers for medical devices has been recommended worldwide. In this study, we propose that the use of a novel plasticizer, 4-cyclohexene-1,2-dicarboxylic acid dinonyl ester (DL9TH), could help produce more useful and safe blood containers...
May 13, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28494040/micro-to-macroroughness-of-additively-manufactured-titanium-implants-in-terms-of-coagulation-and-contact-activation
#15
Rebecca Klingvall Ek, Jaan Hong, Andreas Thor, Mikael Bäckström, Lars-Erik Rännar
PURPOSE: This study aimed to evaluate how as-built electron beam melting (EBM) surface properties affect the onset of blood coagulation. The properties of EBM-manufactured implant surfaces for placement have, until now, remained largely unexplored in literature. Implants with conventional designs and custom-made implants have been manufactured using EBM technology and later placed into the human body. Many of the conventional implants used today, such as dental implants, display modified surfaces to optimize bone ingrowth, whereas custom-made implants, by and large, have machined surfaces...
May 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28489062/ultrasound-transmission-tomography-for-detecting-and-measuring-cylindrical-objects-embedded-in-concrete
#16
Dalmay Lluveras Núñez, Miguel Ángel Molero-Armenta, Miguel Ángel García Izquierdo, Margarita González Hernández, José Javier Anaya Velayos
This study explores the feasibility of using transmission tomographic images based on attenuation measures in transmission to detect and estimate the most common materials that are embedded in concrete, reinforcements and natural and artificial voids. A limited set of concrete specimens have been made in which cylindrical objects such as bars/tubes of steel, PVC and aluminium have been embedded to analyse the effect of size and material. The methodology and scope of this study is presented and numerical simulations are carried out to optimize the emitter-receiver configuration and to understand the complex physical propagation phenomena of ultrasonic signals that travel through concrete with embedded inclusions...
May 10, 2017: Sensors
https://www.readbyqxmd.com/read/28485467/ultrasound-guidance-outperforms-the-palpation-technique-for-peripheral-venous-catheterisation-in-anaesthetised-toddlers-a-randomised-study
#17
N Gopalasingam, D S Obad, B S Kristensen, P Lundgaard, M Veien, J Gjedsted, E Sloth, P Juhl-Olsen
BACKGROUND: Traditional palpation technique for peripheral venous catheter (PVC) placement can be challenging. We aimed to compare the Dynamic Needle Tip Positioning (DNTP) ultrasound technique with the palpation technique for PVC placement in anaesthetised toddlers undergoing elective, low-risk procedures. METHODS: The study was a randomised, controlled, crossover study. Five operators applied both techniques for PVC on 50 children < 4 years. The primary endpoint was first attempt success rate...
May 9, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28477226/-malignant-bileaflet-mitral-valve-prolapse-syndrome-in-otherwise-idiopathic-ventricular-fibrillation
#18
Dirk Vollmann, Claudius Hansen, Lars Lüthje, Ole A Breithardt
A 32-year-old, otherwise healthy woman was admitted after successful out-of-hospital resuscitation due to ventricular fibrillation. Established cardiac, pulmonary, metabolic, and toxicological causes were excluded. However, persisting (biphasic) negative T waves in the inferior ECG leads and premature ventricular contractions (PVC) were noted. PVC morphology indicated a focus alternating between the posterior papillary muscle/the left posterior fascicle and the left ventricular outflow tract region/anterior papillary muscle...
May 5, 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/28472729/new-potentiometric-sensor-based-on-molecularly-imprinted-nanoparticles-for-cocaine-detection
#19
K Smolinska-Kempisty, O Sheej Ahmad, A Guerreiro, K Karim, E Piletska, S Piletsky
Here we present a potentiometric sensor for cocaine detection based on molecularly imprinted polymer nanoparticles (nanoMIPs) produced by the solid-phase imprinting method. The composition of polymers with high affinity for cocaine was optimised using molecular modelling. Four compositions were selected and polymers prepared using two protocols: chemical polymerisation in water and UV-initiated polymerisation in organic solvent. All synthesised nanoparticles had very good affinity to cocaine with dissociation constants between 0...
April 27, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28471536/assessment-of-subtle-cardiac-dysfunction-in-patients-with-frequent-premature-ventricular-complexes-by-real-time-three-dimensional-speckle-tracking-echocardiography
#20
Yunlong Ling, Quan Wan, Qingxing Chen, Wenqing Zhu
BACKGROUND: To evaluate subtle and early premature ventricular complex (PVC)-induced ventricular impairment in patients with frequent PVCs and without structural heart disease by real-time 3-dimensional (3D) speckle tracking echocardiography (RT3D-STE). HYPOTHESIS: Patients with frequent premature ventricular complexes with normal left ventricular ejection fraction have subtle left ventricular dysfunction. METHODS: Forty patients (22 male) with a single source of frequent PVCs and 40 healthy controls (24 male) underwent assessment by conventional 2-dimensional (2D) echocardiography and RT3D-STE...
May 4, 2017: Clinical Cardiology
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