1. A method of noninvasive electrophysiological study of the heart, comprising the following steps: attaching one-off registration electrodes a chest surface, ECG-registering in several unipolar leads from the chest surface: processing ECG-signals in a real-time mode, retrospective processing the ECG signals, generating a computer (CT) or magneto-resonance (MRT) tomography of the chest of a patient with the attached electrodes, constructing and editing computer voxel models of chest and heart organs, constructing polygonal models of a torso, the heart, lungs, and other organs of the chest with the help of a computer program; determining an averaged coefficient of specific electroconductivity for large anatomical structures of the chest on CT or MRT data based on known conformities between a type of biological tissue and a Hounsfield number at CT or between an intensity of an MR-signal at MRT and a type of the biological tissue and its specific electroconductivity; determining coordinates of the registration electrodes on the chest surface; interpolating values of the ECG-signals in nodes of a polygonal grid and obtaining isopotential maps on a polygonal model of the torso; reconstructing an electric field potential at given points of the chest, the heart epicardial surface, interventricular and interatrial septum surfaces based on a model of the chest with a piecewise-constant coefficient of electroconductivity; producing a visualization of results of reconstructing a heart electric field including epicardial electrograms, isochronous and isopotential maps and propagation maps on the polygonal models of the heart and its structures; clinically evaluating the results.