REGULARIZATION FOR THE METHOD OF RECONSTRUCTION OF EQUIVALENT ELECTRIC HEART
GENERATOR OF THE DIPOLE TYPE

Kramm Mikhail Nikolayevich, candidate of technical sciences, associate professor, sub-department of radio engineering fundamentals, National Research University «MPEI» (14 Krasnokazarmennaya street, Moscow, Russia), KrammMN @mail.ru

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10.21685/2307-5538-2018-3-11

Background. The problem of increasing the informative value of electrocardiographic surveys by reconstructing the parameters of an equivalent electric heart generator (EEHG) is considered. The treatment of electrocardiosignals of multichannel electrocardiographic leads with allowance for the known coordinates of the electrodes and geometric parameters of the human torso is proposed, which makes it possible to obtain a temporal dynamics of the changes in the coordinates and the dipole moment vector of an equivalent electric dipole-type generator during a cardiocycle.
Materials and methods. In order to increase the stability of the reconstruction results, a method for regularizing the reconstruction algorithm with an automatic determination of the regularization coefficient is considered.
Results. Examples of calculating the regularization coefficient are presented. An estimation of the stability of reconstruction results with the aid of finite first-order differences is proposed. The influence of the scale level of regularization on the stability of the temporal dynamics of the EEHG coordinates and on the relative error in the approximation of the electrocardiosignals by the model source is considered.
Conclusions. The examples of the operation of the regularized algorithm show the possibility of observing stable temporal dynamics of EEHG parameters. The algorithm is intended to increase the efficiency of diagnostics in electrocardiology, including the diagnosis of transient myocardial ischemia.

multichannel electrocardiographic leads, electrocardiosignals, reconstruction, equivalent electric generator, dipole moment, regularization