Implantable medical device system and method with signal quality monitoring and response
First Claim
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1. An implantable medical device system, comprising:
- a plurality of subcutaneous electrodes forming a plurality of subcutaneous sensing vectors;
a sensing circuit for receiving signals from the plurality of subcutaneous sensing vectors;
a processor for determining a first signal quality metric in response to a first subcutaneous sensing vector signal, comparing the first signal quality metric to a predetermined threshold, and generating a first loss of signal quality response in response to the first signal quality metric crossing the thresholdwherein determining the first signal quality metric comprises calculation of a characteristic of the vector signal, the characteristic corresponding to the quality of the vector signal for providing accurate separation of a sinus rhythm of a patient and a tachyarrhythmia of the patient.
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Abstract
An implantable medical device system and method are provided for monitoring the quality of signals sensed by a subcutaneously implanted device using subcutaneous electrodes. In one embodiment, the method includes selecting one or more sensing vectors; sensing signals from selected sensing vectors, determining a signal quality metric in response to a sensed signal, comparing the signal quality metric to a predetermined threshold, and generating a loss of signal quality response in response to the signal quality crossing the threshold.
223 Citations
25 Claims
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1. An implantable medical device system, comprising:
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a plurality of subcutaneous electrodes forming a plurality of subcutaneous sensing vectors; a sensing circuit for receiving signals from the plurality of subcutaneous sensing vectors; a processor for determining a first signal quality metric in response to a first subcutaneous sensing vector signal, comparing the first signal quality metric to a predetermined threshold, and generating a first loss of signal quality response in response to the first signal quality metric crossing the threshold wherein determining the first signal quality metric comprises calculation of a characteristic of the vector signal, the characteristic corresponding to the quality of the vector signal for providing accurate separation of a sinus rhythm of a patient and a tachyarrhythmia of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for use in a subcutaneously implanted medical device system, comprising:
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selecting a plurality of subcutaneous sensing vectors from a plurality of subcutaneous electrodes; sensing signals from the selected plurality of subcutaneous sensing vectors; determining a first signal quality metric in response to a first selected subcutaneous sensing vector signal, comparing the first signal quality metric to a predetermined threshold, and generating a first loss of signal quality response in response to the first signal quality metric crossing the threshold wherein determining the first signal quality metric comprises calculation of a characteristic of the vector signal, the characteristic corresponding to the quality of the vector signal for providing accurate separation of a sinus rhythm of a patient and an arrhythmia of the patient. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A computer readable medium for storing a set of instructions which cause a subcutaneously implanted medical device system to:
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sense signals from a plurality of subcutaneous sensing vectors formed between a plurality of subcutaneous electrodes; determine a signal quality metric for each of the subcutaneous sensing vector signals; compare the signal quality metric for each subcutaneous sensing vector to a threshold; and provide a loss of signal quality response in response to the signal quality metric crossing the threshold wherein determining the signal quality metric comprises calculation of a characteristic of the vector signal, the characteristic corresponding to the quality of the vector signal for providing accurate separation of a sinus rhythm of a patient and an arrhythmia of the patient.
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Specification