Patent ID: 7708683
Filing Date: 2010-05-04
Classification: A61B

Abstract:
1. A method for assessing cardiac risks in a specific patient based on heart rate variability, comprising: providing heart activity data of a specific patient including a windowed time series related to heart rate variability during a heart rate test; determining a frequency domain value based on at least one of energy values of frequency bands and spectral s assessing the risk of a cardiac event based on the frequency domain value; wherein providing heart activity data comprises determining an instantaneous heart rate sequence from an ECG waveform obtained during an exercise period of increasing heart rate and a recovery period of decreasing heart rate, providing a uniform sample series of the instantaneous heart rate sequence, and reducing the uniform sample series by filtering and/or detrending via fitting a polynomial function to the heart activity data across a selected time window to obtain a heart rate variability waveform associated with variances in the heart rate between beats in a desired frequency band.