Systems and methods for detection of VT and VF from remote sensing electrodes
First Claim
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1. A method for monitoring myopotential, said method comprising:
- (a) sensing a cardiac signal using a pair of extracardiac remote sensing electrodes corresponding to a sensing vector;
(b) sampling the cardiac signal to produce a plurality of samples that are representative of a window of the cardiac signal;
(c) processing the samples to obtain a result and comparing the result to a low threshold and a high threshold; and
(d) categorizing the result as indicative of low, medium or high myopotential based on the comparison.
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Abstract
Methods and systems are provided for performing ventricular arrhythmia monitoring using at least two sensing channels that are each associated with different sensing vectors, for example by different pairs of extracardiac remote sensing electrodes. Myopotential associated with each of the sensing channels in monitored, and a ventricular arrhythmia monitoring mode is selected based thereon (e.g., based on determined myopotential levels). Ventricular arrhythmia monitoring is then performed using the selected monitoring mode.
49 Citations
19 Claims
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1. A method for monitoring myopotential, said method comprising:
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(a) sensing a cardiac signal using a pair of extracardiac remote sensing electrodes corresponding to a sensing vector; (b) sampling the cardiac signal to produce a plurality of samples that are representative of a window of the cardiac signal; (c) processing the samples to obtain a result and comparing the result to a low threshold and a high threshold; and (d) categorizing the result as indicative of low, medium or high myopotential based on the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for detecting myopotential, said system comprising:
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a sensing channel to sense a cardiac signal using a pair of extracardiac remote sensing electrodes corresponding to a sensing vector; a sampler to sample the cardiac signal to produce a plurality of samples that are representative of a window of the cardiac signal; and a myopotential detector to process the samples to obtain a result, compare the result to a low threshold and a high threshold, and categorize the result as indicative of low, medium or high myopotential based on the comparison. - View Dependent Claims (15, 16, 17, 18)
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19. A method for updating at least one parameter that is used for monitoring myopotential associated with a sensing vector corresponding to a pair of subcutaneous extracardiac electrodes implanted in a patient, said method comprising:
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monitoring for changes in a cardiac polarization detection threshold; monitoring the heart rate of the patient; and updating the at least one parameter when the detection threshold has changed by at least a specific amount since the at least one parameter was last updated and the heart rate of the patient is within an acceptable range.
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Specification