Arrhythmia Discrimination Based on Determination of Rate Dependency
First Claim
1. A method of operating a medical device, comprising:
- sensing supraventricular tachycardia (SVT) waveforms during one or more SVT episodes;
measuring heart rates associated with the SVT waveforms;
characterizing morphologies of the SVT waveforms; and
determining whether the morphologies of the SVT waveforms are dependent or independent with respect to heart rate, wherein at least one of characterizing and determining is implemented at least in part by circuitry.
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Abstract
Cardiac systems and methods provide for discriminating between supraventricular tachyarrhythmia and ventricular tachyarrhythmia based on a determination that the patient'"'"'s supraventricular rhythm exhibits rate dependency. One approach involves determining if a patient'"'"'s supraventricular rhythm exhibits rate dependent morphology. If the patient'"'"'s supraventricular rhythm is determined to exhibit rate dependent morphology, an implantable device classifies a detected tachyarrhythmia episode based on one or more templates selected from a plurality of rate-indexed templates stored in the device. Determining if the supraventricular rhythm exhibits rate dependent morphology may also include determining one or more rates at which the rate dependent morphology occurs.
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Citations
20 Claims
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1. A method of operating a medical device, comprising:
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sensing supraventricular tachycardia (SVT) waveforms during one or more SVT episodes; measuring heart rates associated with the SVT waveforms; characterizing morphologies of the SVT waveforms; and determining whether the morphologies of the SVT waveforms are dependent or independent with respect to heart rate, wherein at least one of characterizing and determining is implemented at least in part by circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A medical system, comprising:
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a plurality of cardiac electrodes; sensing circuitry configured to sense supraventricular tachycardia (SVT) waveforms during one or more episodes of SVT through the cardiac electrodes; control circuitry configured to measure heart rates associated with the SVT waveforms, characterize morphologies of the SVT waveforms, and determine whether the morphologies of the SVT waveforms are dependent or independent with respect to rate. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A medical system, comprising:
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a plurality of cardiac electrodes; sensing circuitry configured to sense supraventricular tachycardia (SVT) waveforms during one or more episodes of SVT through the cardiac electrodes; means for characterizing morphologies of the SVT waveforms; and means for determining whether the morphologies of the SVT waveforms are dependent or independent with respect to rate.
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Specification