Separation of a subcutaneous cardiac signal from a plurality of composite signals
First Claim
1. A signal separation method, comprising:
- detecting a plurality of composite signals at a plurality of subcutaneous non-intrathoracic locations, the plurality of composite signals associated with a plurality of sources;
separating a signal from the plurality of composite signals using blind source separation; and
identifying the separated signal as a cardiac signal.
1 Assignment
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Accused Products
Abstract
A cardiac monitoring and/or stimulation method and systems provide monitoring, defibrillation and/or pacing therapies, including systems detecting and/or treating cardiac arrhythmia. A system includes a housing coupled to a plurality of electrodes configured for subcutaneous non-intrathoracic sensing. A signal processor receives a plurality of composite signals associated with a plurality of sources, separates a signal from the plurality of composite signals using blind source separation, and identifies a cardiac signal. The signal processor may iteratively separate signals from the plurality of composite signals until the cardiac signal is identified. A method of signal separation includes detecting a plurality of composite signals at a plurality of locations, separating a signal using blind source separation, and identifying a cardiac signal. The separation may include a principal component analysis and/or an independent component analysis. The composite signals may be filtered before separation using band-pass filtering, adaptive, or other filters.
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Citations
61 Claims
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1. A signal separation method, comprising:
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detecting a plurality of composite signals at a plurality of subcutaneous non-intrathoracic locations, the plurality of composite signals associated with a plurality of sources; separating a signal from the plurality of composite signals using blind source separation; and identifying the separated signal as a cardiac signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. An implantable cardiac device, comprising:
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a plurality of electrodes configured for subcutaneous non-intrathoracic sensing; and a signal processor coupled to the plurality of electrodes, the signal processor configured to receive a composite signal associated with a plurality of sources sensed by at least two of the electrodes, and to extract a cardiac signal from the plurality of composite signals using blind source separation. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55)
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56. An implantable cardiac device, comprising:
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means for subcutaneously detecting a plurality of composite signals produced by a plurality of sources; means for separating a signal from the plurality of composite signals “
using blind source separation”
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andmeans for identifying the separated signal as a cardiac signal. - View Dependent Claims (57, 58, 59, 60, 61)
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Specification