Discrimination of ventricular tachycardia from supraventricular tachycardia
First Claim
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1. A method comprising:
- detecting a tachycardia rhythm;
identifying a rate of change in heart rate corresponding to the tachycardia rhythm;
identifying a rate of change in heart rate variability corresponding to the tachycardia rhythm; and
classifying the tachycardia rhythm as at least one of supraventricular tachycardia or ventricular tachycardia based on the rate of change in heart rate and rate of change in heart rate variability, wherein classifying the tachycardia rhythm comprises;
classifying the tachycardia rhythm as ventricular tachycardia if the rate of change in heart rate variability exceeds both a first and second threshold; and
classifying the tachycardia rhythm as supraventricular tachycardia if the rate of change in heart rate variability does not exceed both the first and second threshold.
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Abstract
This disclosure describes various techniques for discriminating supraventricular tachycardia (SVT) from ventricular tachycardia (VT). As one example, a method includes detecting a tachycardia rhythm, identifying a rate of change in heart rate corresponding to the tachycardia rhythm, identifying a rate of change in heart rate variability corresponding to the tachycardia rhythm, and classifying the tachycardia rhythm as at least one of supraventricular tachycardia or ventricular tachycardia based on the rate of change in heart rate and rate of change in heart rate variability.
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Citations
22 Claims
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1. A method comprising:
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detecting a tachycardia rhythm; identifying a rate of change in heart rate corresponding to the tachycardia rhythm; identifying a rate of change in heart rate variability corresponding to the tachycardia rhythm; and classifying the tachycardia rhythm as at least one of supraventricular tachycardia or ventricular tachycardia based on the rate of change in heart rate and rate of change in heart rate variability, wherein classifying the tachycardia rhythm comprises; classifying the tachycardia rhythm as ventricular tachycardia if the rate of change in heart rate variability exceeds both a first and second threshold; and classifying the tachycardia rhythm as supraventricular tachycardia if the rate of change in heart rate variability does not exceed both the first and second threshold. - View Dependent Claims (2, 3, 4)
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5. A method comprising:
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recording heart rate data for a patient over a period of time; recording heart rate variability data for the patient over the period of time; identifying a relationship between heart rate and heart rate variability for the patient based on the recorded data; detecting a tachycardia rhythm of the patient; identifying a rate of change in heart rate corresponding to the tachycardia rhythm; identifying a rate of change in heart rate variability corresponding to the tachycardia rhythm; and classifying the tachycardia rhythm as at least one of supraventricular tachycardia or ventricular tachycardia based on each of the rate of change in heart rate, the rate of change in heart rate variability, and the relationship.
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6. A system comprising:
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a sensor configured to sense activity of a heart of a patient; and a processor configured to detect a tachycardia rhythm based on the sensed activity, identify a rate of change in heart rate corresponding to the tachycardia rhythm, identify a rate of change in heart rate variability corresponding to the tachycardia rhythm, and classify the tachycardia rhythm as at least one of supraventricular tachycardia or ventricular tachycardia based on the rate of change in heart rate and rate of change in heart rate variability, wherein the processor is configured to classify the tachycardia rhythm as ventricular tachycardia if the rate of change in heart rate variability exceeds both a first and second threshold and classify the tachycardia rhythm as supraventricular tachycardia if the rate of change in heart rate variability does not exceed both the first and second threshold. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A system comprising,
a sensor configured to sense activity of a heart of a patient; - and
a processor configured to detect a tachycardia rhythm based on the sensed activity, identify a rate of change in heart rate corresponding to the tachycardia rhythm, identify a rate of change in heart rate variability corresponding to the tachycardia rhythm, and classify the tachycardia rhythm as at least one of supraventricular tachycardia or ventricular tachycardia based on the rate of change in heart rate and rate of change in heart rate variability, wherein the processor is configured to record heart rate data for the patient over a period of time based on the sensed activity, record heart rate variability data for the patient over the period of time based on the sensed activity, identify a relationship between heart rate and heart rate variability for the patient based on the recorded data, and classify the tachycardia rhythm as at least one of supraventricular tachycardia or ventricular tachycardia based on each of the rate of change in heart rate, rate of change in heart rate variability, and the relationship.
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14. A system comprising:
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means for detecting a tachycardia rhythm; means for identifying a rate of change in heart rate corresponding to the tachycardia rhythm; means for identifying a rate of change in heart rate variability corresponding to the tachycardia rhythm; and means for classifying the tachycardia rhythm as at least one of supraventricular tachycardia or ventricular tachycardia based on the rate of change in heart rate and rate of change in heart rate variability, wherein the means for classifying the tachycardia rhythm comprises; means for classifying the tachycardia rhythm as ventricular tachycardia if the rate of change in heart rate variability exceeds both a first and second threshold; and means for classifying the tachycardia rhythm as supraventricular tachycardia if the rate of change in heart rate variability does not exceed both the first and second threshold.
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15. A method comprising:
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recording heart rate data for a patient over a period of time; recording heart rate variability data for the patient over the period of time; identifying a relationship between heart rate and heart rate variability for the patient based on the recorded data; subsequently detecting a tachycardia rhythm in the patient; and classifying the tachycardia rhythm as at least one of supraventricular tachycardia or ventricular tachycardia based on the relationship. - View Dependent Claims (16)
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17. A system comprising:
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a sensor configured to sense activity of a heart of a patient; and a processor configured to record heart rate data for the patient over a period of time based on the sensed activity, record heart rate variability data for the patient over the period of time based on the sensed activity, identify a relationship between heart rate and heart rate variability for the patient based on the recorded data, subsequently detect a tachycardia rhythm in the patient based on the sensed activity, and classify the tachycardia rhythm as at least one of supraventricular tachycardia or ventricular tachycardia based on the relationship. - View Dependent Claims (18, 19, 20, 21)
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22. A system comprising:
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means for recording heart rate data for a patient over a period of time; means for recording heart rate variability data for the patient over the period of time; means for identifying a relationship between heart rate and heart rate variability for the patient based on the recorded data; means for subsequently detecting a tachycardia rhythm in the patient; and means for classifying the tachycardia rhythm as at least one of supraventricular tachycardia or ventricular tachycardia based on the relationship.
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Specification