ANALYSIS OF THE INFLUENCE OF THE CHOICE OF THE NUMBER OF ELECTRODES ON THE ELECTRIC POTENTIAL DISTRIBUTION MAPS ON THE TORSO SURFACES AND QUASI-EPICARDIUM 

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

615.47:616–072.7 

10.21685/2307-5538-2019-3-7 

Background. The issue of increasing spatial resolution in the analysis of maps of the distribution of electric potential due to the electrical activity of the heart is considered. The spatial resolution is compared on the potential map on the torso surface and on the potential map on the quasi-epicardium surrounding the heart. The influence of the number and placement of electrodes on the possibility of recording the upper spatial frequencies is analyzed. The study is relevant in the tasks of increasing the information content of electrocardiographic examinations by reconstructing the parameters of an equivalent electric heart generator (EEGS).
Materials and methods. In the framework of the model of electrical activity of the heart with small-scale inhomogeneities, two-dimensional spatial spectra of the distribution of electric potential are analyzed.
Results. Comparison of potential maps on the surface of the torso (KPPT) and on the surface of the quasi-epicardium (KPPE) surrounding the heart. A technique is proposed for assessing the possibility of registering upper spatial frequencies at KPPT and KPPPE with various amounts and methods of placing electrodes on the surface of the torso.
Findings. Potential maps on a quasi-epicardium are more informative than potential maps on a torso and display higher spatial frequencies, which means smaller inhomogeneities. The proposed approach using spatial spectra for potential maps on the surface of a quasiepicardium allows one to evaluate the influence of the number and arrangement of electrodes in a multi-electrode system on the surface of a torso on the spatial resolution in the potential map. 

electric potential distribution map, electrodes, torso, quasi-epicardium, spatial spectrum, spatial frequencies