1. A method of noninvasive electrophysiological study of the heart comprising the following stages: an attachment of one-off registration electrodes on the chest surface, an ECG-registration in a great number of unipolar leads from the chest surface: processing of ECG-signals in real-time mode, retrospective processing of ECG obtained, computer (CT) or magneto-resonance (MRT) tomography of the chest of a patient by means of electrodes attached, a construction and edition of computer voxel models of chest and heart organs, a construction of polygonal models of the torso, heart, lungs, and other organs of the chest with the help of a computer program; a determination of an averaged coefficient of specific electroconductivity for large anatomical structures of the chest on CT or MRT data on the basis of known conformities between a type of the biological tissue and the Hounsfield number (at CT) or between an intensity of MR-signal (at MRT) and a type of the biological tissue and its specific electroconductivity; a determination of coordinates of registration electrodes on the chest surface; an interpolation of values of ECG-signals in nodes of a polygonal grid (obtaining isopotential maps on a polygonal model of the torso); a reconstruction of the electric field potential at given points of the chest, the heart epicardial surface, interventricular and interatrial septum surfaces on the basis of a model of the chest with a piecewise-constant coefficient of electroconductivity; a visualization of results of reconstructing the heart electric field in the form of epicardial electrograms, isochronous and isopotential maps as well as propagation maps on polygonal models of the heart and its structures; a clinical evaluation of results.