Key result
Computational optimization yields a two-layer defibrillation electrode with three distinct resistivity regions.
Why the study?
Transthoracic defibrillation requires optimization of current density distribution to achieve uniform excitation of myocardial cells for effective rhythm restoration.
May guide electrode design iterations; leaves open whether optimized resistivity improves clinical defibrillation outcomes.
Transthoracic defibrillation is a procedure applying high intensity electrical current through the thorax region by electrodes, in order to simultaneously activate most of the myocardial cells, thus enforcing them to reinstate a normal rhythm. A solution is proposed for analysis and synthesis of the current density distribution field in the heart region. In an attempt to reach uniform excitation of the greatest possible quantity of myocardial cells, a field image is searched for, with the J-vector uniformity distribution as a criterion. The finite element method and the method of approximating functions are used, as well as nonlinear programming. This approach resulted in designing a two-layer defibrillation electrode, with the layer applied to to the thorax divided in three different resistivity regions.
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Kostadin Brandiski Sava Papazov (2001) studied Transthoracic defibrillation. Two-layer segmented defibrillation electrode was evaluated on Current density distribution field uniformity. A computational approach using the finite element method and nonlinear programming resulted in the design of a two-layer defibrillation electrode with three different resistivity regions.
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