Evaluation method for EKG mapping

Abstract

The invention relates to EKG mapping with a plurality of electrodes attachable to the thorax of a patient at known distance from the heart, wherein time-dependent parameters that specially accentuate the multipole components of the cardiac electrical field are calculated from the voltages at the electrodes. The mapping takes place using the following steps: calculating the voltages projected onto a sphere, the center of which coincides with the electrical center of the heart, from the electrode voltages using the measured electrode distances from the electrical center of the heart, correcting the projected voltages using correction factors for the influence of the conductivity structure in the thorax and the movement of the electrical center of the heart, converting the corrected voltages into a parameter, the values of which are assumed to be constant over the spherical surface, assuming a dipole field, calculating the differences between this parameter and the mean value over the spherical surface, and representing these differences as isointensity lines on a sphere.

Dependencies are inferred from the claim text.