Patent ID: 9414761
Filing Date: 2016-08-16
CPC Classification: A61B

Claim Text:
1. A method for identifying a QRS complex in an Electrocardiogram (ECG) signal, the method comprising: receiving the ECG signal captured by an ECG recorder, wherein the ECG signal is indicative of an electrical activity of heart of an individual; filtering the ECG signal by passing the ECG signal through at least one of a first low-pass filter and a high-pass filter to obtain a filtered ECG signal; squaring the filtered ECG signal to obtain a squared filtered ECG signal; generating an envelope ECG signal by capturing peaks of the squared filtered ECG signal; determining a moving average ECG signal based on a moving average of sample points associated with the envelope ECG signal, wherein a sample point is indicative of an amplitude of the envelope ECG signal at a time instance; and filtering the moving average ECG signal to obtain a processed ECG signal, by passing the moving average ECG signal through a second low-pass filter; identifying a search region in the processed ECG signal, wherein the search region is indicative of a time span between two consecutive peaks of the processed ECG signal; identifying a maximum amplitude peak in a time interval of the filtered ECG signal that corresponds to the time span of the search region of the processed ECG signal, wherein the maximum amplitude peak is an R peak of an R wave of the QRS complex; and identifying a Q peak of a Q wave, and an S peak of an S wave, of the QRS complex based on the R peak of the R wave.