Huge reduction of defibrillation thresholds using four electrode defibrillators

In the absence of a better solution, ventricular fibrillation is treated by applying one or several large electrical shocks to the patient. The question of how to lower the energy required for a successful shock is still a current issue in both fundamental research and clinical practice. In the stud...

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Bibliographic Details
Main Authors: Simic, Ana, Cantalapiedra, Inma R., Elorza, Jorge, Bragard, Jean
Format: Conference Proceeding
Language:English
Subjects:
Abstracts
Bismuth
Computational modeling
Electric shock
Heart beat
Iron
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Summary:In the absence of a better solution, ventricular fibrillation is treated by applying one or several large electrical shocks to the patient. The question of how to lower the energy required for a successful shock is still a current issue in both fundamental research and clinical practice. In the study presented here we will compare defibrillation applied through a four electrode device with the standard procedure using two electrodes. The method is tested through intensive numerical simulations. Here we have used a one dimensional geometry. At the level of the cardiac tissue, the bidomain and the modified Beeler-Reuter models were used. Three different shock waveforms are tested: monophasic and two types of biphasic shocks. The results are compared with those obtained with standard two electrode device. A significant reduction in defibrillation thresholds is achieved for all the three tested waveforms when we use a four electrode device.
ISSN:0276-6574
2325-8853