Subcutaneous cardiac signal discrimination employing non-electrophysiologic signal
First Claim
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1. A device, comprising:
- an implantable housing;
a plurality of subcutaneous non-intrathoracic electrodes configured to sense a plurality of electrical signals;
a sensor that senses a non-electrophysiologic signal; and
a signal processor provided in the housing and coupled to the sensor and the plurality of subcutaneous non-intrathoracic electrodes, the processor configured to initiate a detection window at a start time determined from use of the non-electrophysiologic signal, and to identify a cardiac signal from the plurality of electrical signals using the detection window.
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Abstract
A cardiac monitoring and/or stimulation 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, and identifies the separated signal as a cardiac signal using information derived from a non-electrophysiologic sensor, such as an accelerometer or acoustic transducer. The signal processor may iteratively correlate separated signals from the plurality of composite signals with a non-electrophysiologic sensor signal until the cardiac signal is identified.
150 Citations
20 Claims
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1. A device, comprising:
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an implantable housing; a plurality of subcutaneous non-intrathoracic electrodes configured to sense a plurality of electrical signals; a sensor that senses a non-electrophysiologic signal; and a signal processor provided in the housing and coupled to the sensor and the plurality of subcutaneous non-intrathoracic electrodes, the processor configured to initiate a detection window at a start time determined from use of the non-electrophysiologic signal, and to identify a cardiac signal from the plurality of electrical signals using the detection window. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification