Electrodiagnosis, which includes nerve conduction and needle electromyographic studies, is an essential element in the evaluation of peripheral neuropathies. A systematic approach to the electrodiagnostic evaluation aids in clarifying the distribution and extent of involvement, type of nerve damage, and time course. When these data are combined with clinical information, a full characterization...

BACKGROUND The atrioventricular node (AVN) is the only normal electrical link between the upper and lower chambers of the heart. The AVN modulates transmission of impulses, thus coordinating the contraction of the atria and ventricles. METHODS AND RESULTS Structural and functional complexity, combined with the absence of adequate experimental techniques, has complicated attempts to directly e...

Gaps" in bundle-branch conduction were observed in three patients using the combined technic of premature atrial stimulation and His bundle recordings. In type I gap a complete LBBB pattern disappeared at shorter coupling intervals because the premature atrial impulses encountered enough delay at the A-V node to reach the left bundle branch after the end of its effective refractory period. When...

In this work we solve the set of hydrodynamical equations for accretion disks in the spherical coordinates (r,θ,ϕ) to obtain the explicit structure along θ direction. We study a two-dimensional advective accretion disc in the presence of thermal conduction. We find self-similar solutions for an axisymmetric, rotating, steady, viscous-resistive disk. We show that the global structure of an advec...

background: the pneumatic tourniquet (pt) is routinely used in upper and lower limb operations by most orthopaedic surgeons. the silicone ring tourniquet (srt) was introduced in clinical practice the last decade. clinical as well comparative studies in volunteers concerning its safety and efficacy have been published. the aim of this study was to investigate the postoperative effect of the sili...

Microbial fuel cells (MFCs) are processes used for simultanuous bioenergy capturing and waste treatment. In this study, a model for MFCs based upon a conduction mechanism for electron transfer is proposed, which integrates substrate utilization, current production and conduction and  microbial distribution and growth in batch flow mode. The outputs of the model and that of a mediator based mode...

AIMS Reduced excitability and gap junction expression are commonly found in electrically remodelled diseased hearts, but their contribution to slow conduction and arrhythmias is unclear. In this study, we have investigated the effect of isolated and combined reductions in membrane excitability and intercellular coupling on impulse propagation and arrhythmogeneity in genetically modified mice. ...

The electrochromic (EC) performance of smart windows is highly dependent on the rate ions insertion/extraction. A direct way to increase ion exchange in EC device modify structure electrodes. Structural changes also affect electrical conduction between transparent electrodes and layers, leading efficient windows. In more detail, modifying results an surface-to-volume ratio, which combined with ...

BACKGROUND Activation mechanisms through gaps in ablation lines and resulting electrograms are poorly understood. METHODS AND RESULTS Eight patients (all men; age, 59+/-9 years) were studied during a recurrence of typical atrial flutter (cycle length, 233+/-19 ms) after a previous catheter ablation in the cavotricuspid isthmus. High-density 3-dimensional mapping of the isthmus was performed w...