Patent ID: 8388547
Filing Date: 2013-03-05
Classification: A61B,G06T

Abstract:
1. A method for a noninvasive electrophysiological study of the heart, comprising the following steps: attaching one-off registration electrodes and an ECG-recorder with multiple unipolar leads to a patient's chest and using said electrodes and said recorder for: constructing and editing computer voxel models of the chest and heart, based on said computed tomography (CT) or said magneto-resonance tomography (MRT) of the chest of the patient with the electrodes attached, constructing polygonal models of the chest and heart with the help of a computer program, using said voxel models of the chest and heart, constructing a finite-element grid containing nodes of a region bounded by the external surface of the chest and the heart epicardial surface based on said polygonal models; determining a specific electroconductivity coefficient of a biological tissue for each said node of the finite-element grid, by determining a type of a biological tissue based on Hounsfield numbers for the patient in said computer tomograms or determining a type of a biological tissue based on values of an MR-signal in said magneto-resonance tomograms; determining coordinates of the registration electrodes on the chest surface; interpolating values of the ECG-signals in nodes of said polygonal models therefore obtaining isopotential maps on a polygonal model of the torso; reconstructing an electric field potential at given points of the chest and heart epicardial, interventricular, and interatrial septum surfaces; and visualizing, based on said reconstructing step, the reconstructed heart electric field potential in the form of epicardial electrograms, and isochronous and isopotential maps on said polygonal models of the heart.