Method and system for extracting cardiac parameters from plethysmographic signals
First Claim
1. A method for determining cardiac parameters of a subject, comprising:
- receiving a signal from a thoracocardiograph (TCG) sensor, the signal being sensitive to positions and/or motions of an anterior chest wall of the subject, and the signal comprising a cardiac component, a respiratory component, and noise and/or artifact components;
receiving one or more electrocardiogram (ECG) signals;
filtering the received TCG signal such that one or more of the respiratory component and the noise and/or artifact components in the received TCG signal are reduced, the filtering comprising one or more of wavelet de-noising, non-linear filtering, and state space filtering;
ensemble averaging the filtered TCG signal such that a respiratory component remaining in the filtered TCG signal is reduced, ensemble members being triggered by occurrence of one or more selected fiducial points determined in the ECG signal; and
extracting parameters of cardiac functioning from the ensemble averaged signal.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for determining cardiac parameters of a subject includes receiving a signal from a thoracocardiograph (TCG) sensor. The signal is sensitive to positions and/or motions of an anterior chest wall of the subject and include a cardiac component, a respiratory component, and noise and/or artifact components. The method also includes receiving one or more electrocardiogram (ECG) signals and filtering the received TCG signal to limit one or more of the respiratory component and the noise and/or artifact components. The filtering includes one or more of wavelet de-noising, non-linear filtering, and state space filtering. The method further includes ensemble averaging thefiltered TCG signal. Ensemble members are triggered by occurrence of one or more selected fiducial points determined in the ECG signal. Additionally, the method includes extracting parameters of cardiac functioning from the ensemble averaged signal.
-
Citations
12 Claims
-
1. A method for determining cardiac parameters of a subject, comprising:
-
receiving a signal from a thoracocardiograph (TCG) sensor, the signal being sensitive to positions and/or motions of an anterior chest wall of the subject, and the signal comprising a cardiac component, a respiratory component, and noise and/or artifact components; receiving one or more electrocardiogram (ECG) signals; filtering the received TCG signal such that one or more of the respiratory component and the noise and/or artifact components in the received TCG signal are reduced, the filtering comprising one or more of wavelet de-noising, non-linear filtering, and state space filtering; ensemble averaging the filtered TCG signal such that a respiratory component remaining in the filtered TCG signal is reduced, ensemble members being triggered by occurrence of one or more selected fiducial points determined in the ECG signal; and extracting parameters of cardiac functioning from the ensemble averaged signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
Specification