Patent ID: 7751875
Filing Date: 2010-07-06
Classification: A61B,G16H

Abstract:
1. A device for analyzing cardiac electrical activity comprising: a data input for obtaining ECG data measured from a plurality of sites on the surface of a patient's body; a signal processing module coupled to the data input and which computes a normalized time variable heart vector that represents size and orientation of a time varying electrical dipole approximating the electrical activity of a patient's body, wherein the normalized time variable heart vector is normalized by a normalization factor computed by computing a lead normalization factor from each of at least three actual ECG lead sites on the surface of a patient's body; wherein each lead normalization factor is a function of measured voltage over time from the actual lead site, the time variable heart vector, and a lead vector corresponding to the actual lead site; and the normalization factor is selected from within the range defined by the lead normalization factors; and an output coupled to the signal processing module and which reports the normalized time variable heart vector.