Patent ID: 9215987
Filing Date: 2015-12-22
Classification: A61B,G16H

Abstract:
1. A method of predicting ventricular arrhythmias, comprising: receiving an electrical signal from a subject's heart for a plurality of heart beats; identifying characteristic intervals and heart beat durations of the electrical signal corresponding to each of the plurality of heart beats to provide a plurality of characteristic intervals with corresponding heart beat durations; representing dynamics of said plurality of characteristic intervals as a function of a plurality of preceding characteristic intervals and durations of corresponding heart beats over a chosen period time; assessing a stability of said function over said chosen period of time; and predicting ventricular arrhythmias based on detected instabilities in the dynamics of said characteristic intervals, wherein said receiving an electrical signal is at least one of receiving an ECG or ICD electrogram signal, wherein said characteristic intervals are QT intervals of said at least one of said ECG or ICD electrogram signal, wherein said representing the dynamics of said plurality of characteristic intervals includes determining parameters of a QT interval dynamics model based on said QT intervals and on RR intervals, and wherein said QT interval dynamics model is an ARX model.