SYSTEMS AND METHODS FOR USE BY AN IMPLANTABLE MEDICAL DEVICE FOR DETECTING HEART FAILURE BASED ON THE INDEPENDENT INFORMATION CONTENT OF IMMITANCE VECTORS
First Claim
1. A method for use with an implantable medical device for implant within a patient, the method comprising:
- sensing physiological signals within the patient along a plurality of different vectors;
determining an amount of independent informational content among the physiological signals of the different vectors; and
controlling at least one function based on the amount of independent informational content among the physiological signals of the different vectors.
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Abstract
Techniques are provided for detecting heart failure or other medical conditions within a patient using an implantable medical device, such as pacemaker or implantable cardioverter/defibrillator, or external system. In one example, physiological signals, such as immittance-based signals, are sensed within the patient along a plurality of different vectors, and the amount of independent informational content among the physiological signals of the different vectors is determined. Heart failure is then detected by the implantable device based on a significant increase in the amount of independent informational content among the physiological signals. In response, therapy may be controlled, diagnostic information stored, and/or warning signals generated. In other examples, at least some of these functions are performed by an external system.
45 Citations
32 Claims
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1. A method for use with an implantable medical device for implant within a patient, the method comprising:
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sensing physiological signals within the patient along a plurality of different vectors; determining an amount of independent informational content among the physiological signals of the different vectors; and controlling at least one function based on the amount of independent informational content among the physiological signals of the different vectors. - 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)
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25. A system for use with an implantable medical device for implant within a patient, the system comprising:
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a multiple vector physiological signal detection unit operative to sense physiological signals within the patient along a plurality of different vectors; and an independent information content determination unit operative to determine an amount of independent informational content among the physiological signals of the different vectors; and a controller operative to control at least one function based on the amount of independent informational content among physiological signals of the different vectors. - View Dependent Claims (26, 27, 28, 29, 30)
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31. A method for use with an implantable medical device for implant within a patient for detecting heart failure, the method comprising:
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sensing immittance signals within the patient along a plurality of different vectors; determining an amount of independent informational content among the immittance signals of the different vectors, wherein an increase in the amount of independent informational content of the vectors is representative of heart failure; and detecting heart failure based on the amount of independent informational content among the immittance signals of the different vectors.
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32. A system for use with an implantable medical device for implant within a patient, the system comprising:
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means for sensing physiological signals within the patient along a plurality of different vectors; means for determining an amount of independent informational content among physiological signals of the different vectors; and means for controlling at least one function based on the amount of independent informational content among physiological signals of the different vectors.
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Specification