[Optimization of the performance of electric defibrillation of the heart].

The experimental study of 20 mongrel dogs has defined the values of threshold defibrillation (TDF) in 4 positions of voltage electrodes. Analysis of the findings by using the equivalent electric circuit has led to the conclusion that the increase of TDF values, even up to the absence of an effect produced by defibrillation, is due to the shunting of electromagnetic field lines, bypassing the myocardial component of the external circuit of an electrical pulse generator.