System for open-chest, multidirectional electrical defibrillation

System for open-chest, multidirectional electrical defibrillation

Introduction: Cardiomyocytes are more sensitive to stimulatory electrical fields when the latter are applied longitudinally to the cell major axis. In the whole heart, cells have different spatial orientations, which may limit the effectiveness of conventional electrical defibrillation (i.e., shock delivery in a single direction). This article describes the constructive aspects of a portable sy...

Multidirectional ECG Coherent Optimal Timing of Defibrillation Shocks

Electrical energy requirements for ventricular defibrillation.

Comparison of activation during ventricular fibrillation and following unsuccessful defibrillation shocks in open-chest dogs.

The purpose of this study was to map in detail the spread of activation away from sites of early postshock excitation following unsuccessful defibrillation to determine whether these activation fronts are the unaltered continuation of activation fronts present just before the shock. We recorded simultaneously from 120 bipolar electrodes on 40 plunge needles in a 20 x 35 x 5-mm volume of tissue ...

Optimal parameters of electrical impulses for defibrillation by condenser discharges.

• Determination of the defibrillation threshold of the heart is important not only for developing the technique of defibrillation per se but also for improving the design of instruments used for that purpose. Previous workhas shown the necessity of selecting, for the discharge circuit, parameters that will keep voltage as low as possible, but many questions concerning the optimal parameters for...