Methods and apparatus for enhanced fiducial point determination and non-invasive hemodynamic parameter determination
First Claim
1. A computer-implemented method of assessing cardiac function within a living subject, comprising:
- obtaining;
(i) acoustic information relating to the cardiac system of said subject, the acoustic information including a heart sound;
(ii) electrocardiographic (ECG) information relating to said subject; and
(iii) impedance cardiographic (ICG) information relating to said subject;
using the ECG information to validate a timing of the heart sound of the acoustic information so as to provide a validated sound event of the acoustic information;
using the validated sound event of the acoustic information to detect a fiducial point of the ICG information; and
utilizing said acoustic, ECG and ICG information substantially in concert to assess cardiac function.
3 Assignments
0 Petitions
Accused Products
Abstract
Methods and apparatus for utilizing multiple sources of physiologic data to enhance measurement robustness and accuracy. In one embodiment, phonocardiography or “heart sounds” data is used in combination with one or more other techniques (for example, impedance cardiography or ICG waveforms, and/or electrocardiography or ECG waveforms) to provide more accurate and robust physiological and/or hemodynamic assessment of living subjects. In one variant, the aforementioned methods and apparatus are used to improve ICG fiducial point (e.g., B, C and X point) detection and identification accuracy. Moreover, the new ICG fiducial points that may be clinically important may be identified using the disclosed methods and apparatus. In a further aspect, the invention discloses methods and apparatus for utilization of ICG and/or ECG waveform information to improve the identification and characterization of heart sounds (such as e.g., S1, S2, S3, or S4 heart sounds), murmurs, and other such artifacts or phenomena.
37 Citations
35 Claims
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1. A computer-implemented method of assessing cardiac function within a living subject, comprising:
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obtaining; (i) acoustic information relating to the cardiac system of said subject, the acoustic information including a heart sound; (ii) electrocardiographic (ECG) information relating to said subject; and (iii) impedance cardiographic (ICG) information relating to said subject; using the ECG information to validate a timing of the heart sound of the acoustic information so as to provide a validated sound event of the acoustic information; using the validated sound event of the acoustic information to detect a fiducial point of the ICG information; and utilizing said acoustic, ECG and ICG information substantially in concert to assess cardiac function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A computer-implemented method of assessing cardiac function within a living subject, comprising:
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obtaining acoustic information relating to the cardiac system of said subject, the acoustic information including a heart sound; obtaining electrocardiographic (ECG) signals relating to said subject; and obtaining impedance cardiographic (ICG) signals relating to said subject; converting said acoustic information into electrical acoustic signals, and providing said acoustic, ECG, and ICG signals to a processing device; using the ECG signals to validate a timing of the heart sound of the acoustic information so as to provide a validated sound event of the acoustic information; using the validated sound event of the acoustic information to detect a fiducial point of the ICG signals; and utilizing said acoustic, ECG and ICG signals to form a profile of the cardiac function of said living subject. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A computer-implemented method of assessing cardiac regurgitation within a living subject, comprising:
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obtaining acoustic information relating to the cardiac system of said subject, the acoustic information including a heart sound; obtaining electrocardiographic (ECG) information relating to said subject; and obtaining impedance cardiographic (ICG) information relating to said subject; using the ECG information to validate a timing of the heart sound of the acoustic information so as to provide a validated sound event of the acoustic information; using the validated sound event of the acoustic information to detect a fiducial point of the ICG information; and utilizing said acoustic, ECG and ICG information collectively to assess cardiac regurgitation within said subject. - View Dependent Claims (32, 33)
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34. A computer-implemented method of assessing quality of cardiac data obtained from a living subject, comprising:
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obtaining acoustic information relating to the cardiac system of said subject, the acoustic information including a heart sound; obtaining electrocardiographic (ECG) information relating to said subject; obtaining impedance cardiographic (ICG) information relating to said subject; using the ECG information to validate a timing of the heart sound of the acoustic information so as to provide a validated sound event of the acoustic information; using the validated sound event of the acoustic information to detect a fiducial point of the ICG information; and utilizing said acoustic, ECG and ICG information to assess the quality of one or more cardiac beats. - View Dependent Claims (35)
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Specification