Ca is critical in both the electrical and mechanical properties of cardiac myocytes, and much is known about ionic currents and the normal excitation-contraction coupling process. In heart failure, there are significant alterations in how myocyte Ca is regulated, and these alterations are critical in dictating both contractile dysfunction and certain cardiac arrhythmias that are characteristic ...

Electrical excitation of the mammalian heart originates from specialized pacemaker cells in the right atrium. Pacemaker activity depends on multiple ion channels and transport mechanisms that reside primarily within the plasma membrane. However, recent evidence indicates that intracellular Ca2+ release from the sarcoplasmic reticulum also contributes importantly to atrial pacemaker function.

Definition Finite element modeling is an important computational tool in neural engineering to simulate neural excitation with implanted electrodes or with surface electrodes. Besides its importance for analyzing artificially generated neural activities, e.g., in the spinal cord (Danner et al., 2014; Hofstoetter et al., 2014), this technique is useful to interpret recorded electrical biosignals...

Submit Manuscript | http://medcraveonline.com Abbreviations: CI, Cochlear implant; OR, Operating room; EI, electrode impedance; ECAP, electrically evoked compound action potential; SOE, spread of excitation; CT, computed tomography; DSP, digital signal processing; RF, radiofrequency transmitter; PC, personal computer; IR, Intra-operative; ESRTs, Electrical stapedil reflex thresholds, ECoh G, El...

We study the effects of control domain position on optimal control problem of cardiac arrhythmia. The well-established mathematical model, namely, the monodomain model, is used to represent the electrical behavior of the cardiac tissue. Two test cases are considered in this paper: the control domain for Test Case 1 is close to the excitation domain, while the control domain for Test Case 2 is a...

projected approach. Note that the actual k-space trajectory follows well with the nominal one, indicating eddy current is not a problem for our design on our scanner. Figure 1: (a) Nonselective spiral (SPINS) trajectory. (b) Output trajectory in the proposed joint design for the cube excitation. The proposed joint design selective traverses regions in the k-space that need high energy depositio...

We describe a fabrication technique for double-paddle oscillators based solely on wet etching, resulting in quality factors up to 8 ·105 at room temperature and in vacuum. The quality factor achieved is the highest demonstrated so far at room temperature. The fabrication procedure, not involving any dry etching step, represents a valid and low cost alternative to the other techniques previously...

Submit Manuscript | http://medcraveonline.com Abbreviations: CI, Cochlear implant; OR, Operating room; EI, electrode impedance; ECAP, electrically evoked compound action potential; SOE, spread of excitation; CT, computed tomography; DSP, digital signal processing; RF, radiofrequency transmitter; PC, personal computer; IR, Intra-operative; ESRTs, Electrical stapedil reflex thresholds, ECoh G, El...

I am submitting herewith a dissertation written by Seong Taek Lee entitled “Development and Analysis of Interior Permanent Magnet Synchronous Motor with Field Excitation Structure.” I have examined the final electronic copy of this dissertation for form and content and recommend that it be accepted in partial fulfillment of the requirements for the degree of Doctor of Philosophy, with a major i...

The development of atrial fibrillation in 2 patients, following an electrical shock is reported. One patient, with an underlying pre-excitation syndrome, had to be cardioverted due to rapid ventricular rate and hypotension. The other, with normal conduction, tolerated the arrhythmia well and atrial fibrillation reverted spontaneously after 24 hours.