scholarly journals Investigating cardiac stimulation limits of MRI gradient coils using electromagnetic and electrophysiological simulations in human and canine body models

2020 ◽  
Vol 85 (2) ◽  
pp. 1047-1061
Author(s):  
Valerie Klein ◽  
Mathias Davids ◽  
Lothar R. Schad ◽  
Lawrence L. Wald ◽  
Bastien Guérin
Keyword(s):  
Gradient Coils ◽  
Cardiac Stimulation

A new Target Field Method for Optimizing Longitudinal Gradient Coils' Property

PIERS Online ◽  
2007 ◽  
Vol 3 (6) ◽  
pp. 865-869 ◽  
Author(s):  
Feng Qi ◽  
Xin Tang ◽  
Zhe Jin ◽  
Le Wang ◽  
Donglin Zu ◽  
...  
Keyword(s):  
Field Method ◽  
Gradient Coils ◽  
Longitudinal Gradient ◽  
Target Field

INFLUENCE OF RIGHT VENTRICULAR LEAD IMPLANTATION SITE CHOICE ON PACING EFFICIENCY

2020 ◽  
pp. 13-17
Author(s):  
Dmitrii Aleksandrovich Lopyn ◽  
Stanislav Valerevich Rybchynskyi ◽  
Dmitrii Evgenevich Volkov
Keyword(s):  
Heart Failure ◽  
Right Ventricular ◽  
Longitudinal Strain ◽  
Treatment Options ◽  
Global Longitudinal Strain ◽  
Optimal Method ◽  
Cardiac Stimulation ◽  
Ventricular Lead ◽  
The Right ◽  
Stimulation Of

Currently the electrophysiological treatment options have been considered to be the most effective for many patients with arrhythmogenic cardiomyopathies, as well as in those with arrhythmias on the background of heart failure. Currently, the dependence of efficiency of the pacemakers on the location of the electrodes has been proven. In order to study the effect of a myocardial dysynchrony on the effectiveness of pacing depending on the location of the right ventricular electrode, an investigation has been performed. This study comprised the patients with a complete atrioventricular block, preserved ejection fraction of the left ventricle (more than 50 %), with no history of myocardial infarction, who were implanted with the two−chamber pacemaker. It has been established that the best results were achieved with a stimulation of the middle and lower septal zone of the right ventricle, the worst ones were obtained with a stimulation of its apex. It has been found that the dynamics of the magnitude of segmental strains and a global longitudinal strain coincided with the dynamics of other parameters of the pacemaker effectiveness, which indicated the pathogenetic value of myocardial dysynchrony in the progression of heart failure after implantation of the pacemaker. Therefore it could be concluded that the studying of myocardial mobility by determining a longitudinal strain for assessing the functional state of the myocardium and the effectiveness of pacing is highly advisable. It is emphasized that the use of the latest strains−dependent techniques for cardiac performance evaluation in the patients with bradyarrhythmia have a great potential to predict the development of chronic heart failure and to choose the optimal method of physiological stimulation of the heart. Key words: right ventricular lead, cardiac stimulation, myocardial dyssynchrony.

Electric field calculation and peripheral nerve stimulation prediction for head and body gradient coils

2021 ◽  
Author(s):  
Peter B. Roemer ◽  
Trevor Wade ◽  
Andrew Alejski ◽  
Charles A. McKenzie ◽  
Brian K. Rutt
Keyword(s):  
Electric Field ◽  
Peripheral Nerve ◽  
Nerve Stimulation ◽  
Peripheral Nerve Stimulation ◽  
Field Calculation ◽  
Gradient Coils ◽  
Electric Field Calculation

scholarly journals Burns to be alive: a complication of transcutaneous cardiac stimulation

Critical Care ◽  
2014 ◽  
Vol 18 (6) ◽  
Author(s):  
Xavier Muschart
Keyword(s):  
Cardiac Stimulation

An analytical approach to the design of quiet cylindrical asymmetric gradient coils in MRI

2007 ◽  
Vol 31B (4) ◽  
pp. 218-236 ◽  
Author(s):  
Lawrence K. Forbes ◽  
Michael A. Brideson ◽  
Stuart Crozier ◽  
Peter T. While
Keyword(s):  
Analytical Approach ◽  
Gradient Coils

Modal Analysis of Currents Induced by Magnetic Resonance Imaging Gradient Coils

2014 ◽  
Vol 50 (2) ◽  
pp. 945-948 ◽  
Author(s):  
Hector Sanchez ◽  
Michael Poole ◽  
Adnan Trakic ◽  
Fabio Freschi ◽  
Elliot Smith ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Modal Analysis ◽  
Resonance Imaging ◽  
Gradient Coils ◽  
Imaging Gradient

Torque free asymmetric gradient coils for echo planar imaging

1994 ◽  
Vol 31 (4) ◽  
pp. 450-453 ◽  
Author(s):  
A. M. Abduljalil ◽  
A. H. Aletras ◽  
Pierre-Marie Robitaille
Keyword(s):  
Echo Planar Imaging ◽  
Planar Imaging ◽  
Gradient Coils ◽  
Echo Planar
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