Methods and devices for determination of arrhythmia rate zone thresholds
First Claim
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1. A method of delivering cardiac therapy, comprising:
- measuring heart rate values;
determining a probability function for the measured heart rate values;
determining a number of heart rate zones based on the probability function, wherein the number of heart rate zones are periodically updated; and
delivering the cardiac therapy via a cardiac therapy device based on the rate zones.
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Abstract
Approaches for determining threshold values for one or more arrhythmia rate zones and/or the number of rate zones are described. A probability function for heart rate is determined using collected and measured heart rate values. One or more heart rate probability values are selected. Thresholds for arrhythmia rate zones are determined from the probability function based on the selected probability values. Determining the rate zone thresholds may involve determining a threshold for a lower rate limit and/or determining one or more tachyarrhythmia rate zone thresholds. The number of rate zones may also be determined based on the probability function.
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Citations
19 Claims
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1. A method of delivering cardiac therapy, comprising:
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measuring heart rate values; determining a probability function for the measured heart rate values; determining a number of heart rate zones based on the probability function, wherein the number of heart rate zones are periodically updated; and delivering the cardiac therapy via a cardiac therapy device based on the rate zones. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A cardiac device, comprising:
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sensing circuitry configured to sense cardiac electrical signals; heart rate measurement circuitry coupled to the sensing circuitry and configured to measure heart rate values based on the sensed cardiac electrical signals; and a rate zone processor configured to determine a number of rate zones based on a probability function for the measured heart rate values, wherein the number of heart rate zones are periodically updated. - View Dependent Claims (12, 13, 14, 15)
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16. A cardiac therapy system, comprising:
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sensing circuitry configured to sense cardiac electrical signals; heart rate measurement circuitry coupled to the sensing circuitry and configured to measure heart rate values based on the sensed cardiac electrical signals; and means for determining a number of heart rate zones based on a probability function for the measured heart rate values, wherein the number of heart rate zones are periodically updated. - View Dependent Claims (17, 18, 19)
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Specification