Patent ID: 8874199
Filing Date: 2014-10-28
Classification: A61B

Abstract:
1. An electrocardiogram analyzer for analyzing a multi-channel electrocardiogram, comprising: a multi-channel electrocardiogram generating unit which generates the multi-channel electrocardiogram by synthesizing, for each channel of the multi-channel electrocardiogram, X, Y, and Z lead waveforms based on x, y, and z components of a corresponding one of a plurality of synthetic bipolar lead vectors, the synthetic bipolar lead vectors being determined by using electrode positions on an image surface, each channel of the multi-channel electrocardiogram representing an electrocardiogram at a different electrode position and the number of channels of the multi-channel electrocardiogram is larger than that of actually measured channels to generate the X, Y, and Z lead waveforms; a late potential distribution calculating unit which obtains a late potential in each channel from the multi-channel electrocardiogram; a RT dispersion distribution calculating unit which calculates a dispersion of a RT interval in each channel from the multi-channel electrocardiogram; a (Tpeak-negative dV/dt) dispersion calculating unit which obtains, as an index reflecting the state of an M cell between an epicardium and an endocardium, a dispersion of a Tpeak-negative dV/dt defined as a difference between a maximum and minimum Tpeak-negative dV/dt intervals, wherein the Tpeak-negative dV/dt interval is an interval from a maximum peak of a T wave to a minimum peak in a first derivative waveform of a T-wave descending limb, for each channel of the multi-channel electrocardiogram; and a display control unit which simultaneously displays two-dimensional distributions of both the late potential and the dispersion of the RT interval such that the two distributions are comparable, wherein said display control unit is configured to display a two-dimensional distribution of the dispersion of the Tpeak-negative dV/dt.