Patent ID: 7819814
Filing Date: 2010-10-26
Classification: A61B

Abstract:
1. A method for analyzing a change in the functionality of the heart and the respiratory system of a patient, comprising: identifying the respiratory activity ( temporally segmenting said respiratory and said cardiac sounds to express the segments of physiological rhythmicity, by the means of a feature extraction module ( extracting stable features of the heart sounds with respect to their timing in the respiratory cycle, thus providing synchronized stable features for diminishing stochastic variability, by the means of a timing analysis module ( averaging the features of segments of heart sounds with respect to the corresponding respiratory cycle; wherein the averaging results in averages in which the temporal variability of said segments is preserved; determining the extent of temporal variability in groups of synchronized stable sound features, and detecting change over time of at least one feature in a synchronized stable sound relative to a baseline, by the means of a temporal segmentation and feature parameter extraction module (