PubMed Journals Articles About "Conduction Defects" RSS

11:51 EDT 18th March 2018 | BioPortfolio

Conduction Defects PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Conduction Defects articles that have been published worldwide.

More Information about "Conduction Defects" on BioPortfolio

We have published hundreds of Conduction Defects news stories on BioPortfolio along with dozens of Conduction Defects Clinical Trials and PubMed Articles about Conduction Defects for you to read. In addition to the medical data, news and clinical trials, BioPortfolio also has a large collection of Conduction Defects Companies in our database. You can also find out about relevant Conduction Defects Drugs and Medications on this site too.

Showing "Conduction defects" PubMed Articles 1–25 of 2,100+

A Performance-testing Platform for a Conduction Micropump with an FR-4 Copper-clad Electrode Plate.

Here, a conduction micropump with symmetric planar electrode pairs prepared on flame-retardant glass-reinforced epoxy (FR-4) copper-clad laminate (CCL) is fabricated. It is used to investigate the influence of chamber dimensions on the performance of a conduction micropump and to determine the reliability of the conduction pump when acetone is used as the working fluid. A testing platform is set up to evaluate conduction micropump performance under different conditions. When the chamber height is 0.2 mm, th...

Relaxation dynamics and polydispersivity associated with defects and ferroelectric correlations in Ba-doped EuTiO3.

We present the frequency- and temperature-dependent dielectric response of Eu1-x Ba x TiO3 (0  ⩽  x  ⩽  0.5) in detail. Excluding grain boundary effects, four relaxation mechanisms were observed. Relaxation dynamics were observed to arise due to hopping conduction associated with defects, namely oxygen vacancies as well as Eu(3+) and Ti(3+) ions. Dielectric relaxation analysis led to the identification of Ti ions in two different environments with different relaxation rates in the overal...

Theoretical Understanding of Mechanisms of Proton Exchange Membranes Made of 2D Crystals with Ultrahigh Selectivity.

Recent reports on proton conduction across pristine graphene and h-BN provide a new avenue for the design of proton exchange membranes. The uniform pores formed by the electron clouds of 2D crystals can effectively block the undesired transportation of other species thus ultrahigh selectivity can be achieved. With the aid of first-principles calculations, we investigate the proton conduction process across six kinds of intact 2D crystals, namely graphene, h-BN, β12 boron sheet, χ3 boron sheet, phosphorene...

Recombinant human collagen-based microspheres mitigate cardiac conduction slowing induced by adipose tissue-derived stromal cells.

Stem cell therapy to improve cardiac function after myocardial infarction is hampered by poor cell retention, while it may also increase the risk of arrhythmias by providing an arrhythmogenic substrate. We previously showed that porcine adipose tissue-derived-stromal cells (pASC) induce conduction slowing through paracrine actions, whereas rat ASC (rASC) and human ASC (hASC) induce conduction slowing by direct coupling. We postulate that biomaterial microspheres mitigate the conduction slowing influence of ...

Size Matters: Defining Critical in Bone Defect Size!

Bone defects are common and are associated with a significant burden of disease. The treatment of these injuries remains controversial, particularly those defects which are critical sized. Despite the need for decision making to be evidence based, a lack of consensus around definitions of critical-sized defects still exists, particularly around those defects in the 1-3 cm range. There is a need to define "critical" in bone defect size because noncritical defects may heal without planned reconstruction and s...

Temporary persistence of conduction block after prolonged kilohertz frequency alternating current on rat sciatic nerve.

Application of kilohertz frequency alternating current (KHFAC) waveforms can result in nerve conduction block that is induced in less than a second. Conduction recovers within seconds when KHFAC is applied for about 5-10 min. This study investigated the effect of repeated and prolonged application of KHFAC on rat sciatic nerve with bipolar platinum electrodes.

Sound wave propagation on the human skull surface with bone conduction stimulation.

Bone conduction (BC) is an alternative to air conduction to stimulate the inner ear. In general, the stimulation for BC occurs on a specific location directly on the skull bone or through the skin covering the skull bone. The stimulation propagates to the ipsilateral and contralateral cochlea, mainly via the skull bone and possibly via other skull contents. This study aims to investigate the wave propagation on the surface of the skull bone during BC stimulation at the forehead and at ipsilateral mastoid.

Core to shell switching of the conduction channel on SnO2 nanowire sensors.

A sensor based on random connections of single-crystalline SnO2 nanowires (NWs) has been fabricated for ethanol detection. The NW length of ∼10 μm leads to the formation of several random node connections between the Ag electrodes. The samples were subjected to thermal treatments under a reducing atmosphere of H2/Ar, to generate oxygen vacancies at the surface of the NWs. As a result, the core conduction channel of the NWs, where the conduction is based on electron hopping through the potential barriers ...

Phrenic nerve conduction studies: normative data and technical aspects.

The aim of the present study was to define normative data of phrenic nerve conduction parameters of a healthy population.

Central conduction time in auditory brainstem response and ear advantage in dichotic listening across menstrual cycle.

The ovarian hormones fluctuate during the menstrual cycle in women. Such fluctuation of sex hormones, in particular estrogen, is believed to affect the central conduction time in auditory function as well as the language lateralization in cognitive function. However, findings are inconsistent. The underlying mechanisms are also unclear. This paper examined if there was any relation between the central conduction time and the language lateralization at different times during the menstrual cycle. Twenty young...

Diagnostic Value of the Near-Nerve Needle Sensory Nerve Conduction in Sensory Inflammatory Demyelinating Polyneuropathy.

We report here the diagnostic value of the near-nerve needle sensory nerve conduction study (NNN-SNCS) in sensory inflammatory demyelinating polyneuropathy (IDP) in which the routine nerve conduction study was normal or nondiagnostic.

Timing of Conduction Abnormalities Leading to Permanent Pacemaker Insertion After Transcatheter Aortic Valve Implantation-A Single-Centre Review.

Transcatheter aortic valve implantation (TAVI) is the preferred alternative to traditional surgical aortic valve replacement; however, it remains expensive. One potential driver of cost is the need for postprocedural monitoring for conduction abnormalities after TAVI. Given the paucity of literature on the optimal length of monitoring, we aimed to determine when clinically significant conduction abnormalities leading to permanent pacemaker (PPM) insertion after TAVI were first identified.

Utility of Capture-Recapture Methodology to Estimate Prevalence of Congenital Heart Defects Among Adolescents in 11 New York State Counties: 2008 to 2010.

Congenital heart defects (CHDs) are the most common birth defects in the United States, and the population of individuals living with CHDs is growing. Though CHD prevalence in infancy has been well characterized, better prevalence estimates among children and adolescents in the United States are still needed.

The positive effect of venlafaxine on central motor conduction.

Using the triple stimulation technique (TST) and conventional transcranial magnetic stimulation (TMS), this study was designed to investigate the effect of venlafaxine on central motor conduction in healthy adults.

Comparison of the Two Types of Stimulating Electrodes in the Study of Motor Nerve Conduction in Dogs.

In this research two kinds of stimulation electrodes were compared in motor nerve conduction study: needle electrodes used in human medicine and electrodes made of injection needles connected to the stimulator via alligator-type electrodes. A study was conducted in 22 mixed-breed dogs. The resulting values of the potential amplitudes of the stimulus, the parameters of the complex muscle potentials, and the motor nerve conduction velocity were statistically compared. There was no statistical difference betwe...

Comparison of the Effects of Osteochondral Autograft Transplantation With Platelet-Rich Plasma or Platelet-Rich Fibrin on Osteochondral Defects in a Rabbit Model.

Although osteochondral autograft transplantation (OAT) provides satisfactory outcomes for osteochondral defects, for large defects OAT is often inadequate because of graft availability. Osteochondral allograft transplantation is an alternative treatment for large defects, but this approach is limited by graft storage constraints and carries disease transmission risks. Platelet-rich fibrin (PRF) is a second-generation platelet concentrate, and its positive effect on articular cartilage has been reported. How...

Spatial distribution of conduction disorders during sinus rhythm.

Length of lines of conduction block (CB) during sinus rhythm (SR) at Bachmann's bundle (BB) is associated with atrial fibrillation (AF). However, it is unknown whether extensiveness of CB at BB represents CB elsewhere in the atria. We aim to investigate during SR 1) the spatial distribution and extensiveness of CB 2) whether there is a predilection site for CB and 3) the association between CB and incidence of post-operative AF.

Nerve conduction study of the three supraclavicular nerve branches.

We describe a new nerve conduction study technique with reference values for the three branches of the supraclavicular nerve (SCN) in young healthy subjects and application of it in two patients.

Prognostic Classification System for Implant Recession Defects.

The etiology and progression of periimplant mucogingival defects are multifactorial. As such, the aim of this study was to discern and discuss the key long-term prognostic factors that change the balance of homeostasis/regeneration in periimplant mucogingival and recession defects.

Clinical, pathological and dermoscopic characteristics of cutaneous lesions in LEOPARD syndrome.

LEOPARD syndrome (LS) is a rare autosomal disorder associated with multiple congenital anomalies. This term is an acronym for Lentigines (LT), Electrocardiographic conduction defects, Ocular hypertelorism, Pulmonary valve stenosis, Abnormalities of the genitalia, Retardation of growth, and Deafness (1-3) . Mutations in PTPN11 gene cause this syndrome in around 90% of cases, and less frequently other mutations produce this entity(3-4) . This article is protected by copyright. All rights reserved.

Geobacter sulfurreducens pili support ohmic electronic conduction in aqueous solution.

The bacterium Geobacter sulfurreducens is a model biological catalyst in microbial electrochemical devices. G. sulfurreducens forms electrically conductive, electrode-associated biofilms, but the biological structures mediating electrical conduction from cells to the electrodes are a matter of debate. Bacteria in these communities produce a network of fiber-like Type IV pili, which have been proposed to act either as inherent, protein-based electronic conductors, or as electronically inert scaffolds for cyt...

Novel mutation of GATA4 gene in Kurdish population of Iran with nonsyndromic congenital heart septals defects.

The mutations in GATA4 gene induce inherited atrial and ventricular septation defects, which is the most frequent forms of congenital heart defects (CHDs) constituting about half of all cases.

Carbon vacancies in Ti2CT2 MXenes: defects or a new opportunity?

Carbon vacancies are commonly present in two-dimensional (2D) MXenes that hold promise in a variety of applications whereas their behavior remains unknown. Here we report on the influence of carbon vacancies on the structural stability, electronic properties and stiffness of MXenes by taking Ti2CT2 (T = O, F, and OH) as an example. According to the first-principles calculations, the formation energies of carbon vacancies in MXenes are lower than those in other typical 2D materials including graphene and MoS...

Origins and consequences of congenital heart defects affecting the right ventricle.

Congenital heart disease is a major health issue, accounting for a third of all congenital defects. Improved early surgical management has led to a growing population of adults with congenital heart disease, including patients with defects affecting the right ventricle, which are often classified as severe. Defects affecting the right ventricle often cause right ventricular volume or pressure overload and affected patients are at high risk for complications such as heart failure and sudden death. Recent ins...

Experimental Modeling Supports a Role for MyBP-HL as a Novel Myofilament Component in Arrhythmia and Dilated Cardiomyopathy.

Background -Cardiomyopathy and arrhythmias are under significant genetic influence. Here, we studied a family with dilated cardiomyopathy and associated conduction system disease in whom prior clinical cardiac gene panel testing was unrevealing. Methods -Whole genome sequencing and induced pluripotent stem cells were used to examine a family with dilated cardiomyopathy and atrial and ventricular arrhythmias. We also characterized a mouse model with heterozygous and homozygous deletion of MybphlResults -Whol...

Quick Search