Method and apparatus for temporarily varying a parameter in an implantable medical device
First Claim
1. A method for temporarily varying a parameter in an implantable medical device, comprising:
- determining heart rate variability;
comparing the determined heart rate variability to a predetermined target rate profile;
adjusting the parameter from a first setting to a second setting different from the first setting in response to the comparing of the determined heart rate variability and the predetermined target rate profile; and
adjusting the parameter from the second setting to a termination setting in response to expiration of a first predetermined time period.
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Accused Products
Abstract
A method and apparatus for varying a parameter in an implantable medical device that includes a plurality of electrodes stimulating heart tissue and sensing cardiac signals, a timing and control device controlling the stimulation of heart tissue by the plurality of electrodes and measuring intervals between the sensed cardiac signals, a storage device storing the measured intervals, and a microprocessor. The microprocessor determines heart rate variability in response to the stored intervals, compares the determined heart rate variability to a predetermined target rate profile, adjusts the parameter from a first setting to a second setting different from the first setting in response to the comparing of the determined heart rate variability and the predetermined target rate profile, and adjusts the parameter from the second setting to a termination setting in response to a termination event or expiration of a first predetermined time period.
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Citations
44 Claims
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1. A method for temporarily varying a parameter in an implantable medical device, comprising:
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determining heart rate variability; comparing the determined heart rate variability to a predetermined target rate profile; adjusting the parameter from a first setting to a second setting different from the first setting in response to the comparing of the determined heart rate variability and the predetermined target rate profile; and adjusting the parameter from the second setting to a termination setting in response to expiration of a first predetermined time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An implantable medical device, comprising:
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a plurality of electrodes stimulating heart tissue and sensing cardiac signals; a timing and control device controlling the stimulation of heart tissue by the plurality of electrodes and measuring intervals between the sensed cardiac signals; a storage device storing the measured intervals; and a microprocessor determining heart rate variability in response to the stored intervals, comparing the determined heart rate variability to a predetermined target rate profile, adjusting a parameter from a first setting to a second setting different from the first setting in response to the comparing of the determined heart rate variability and the predetermined target rate profile, and adjusting the parameter from the second setting to a termination setting in response to expiration of a first predetermined time period. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An implantable medical device, comprising:
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means for determining heart rate variability; means for comparing the determined heart rate variability to a predetermined target rate profile; means for adjusting a parameter from a first setting to a second setting different from the first setting in response to the comparing of the determined heart rate variability and the predetermined target rate profile; and means for adjusting the parameter from the second setting to a termination setting in response to expiration of a first predetermined time period.
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34. A computer readable medium having computer executable instructions for performing a method comprising:
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determining heart rate variability; comparing the determined heart rate variability to a predetermined target rate profile; adjusting the parameter from a first setting to a second setting different from the first setting in response to the comparing of the determined heart rate variability and the predetermined target rate profile; and adjusting the parameter from the second setting to a termination setting in response to expiration of a first predetermined time period.
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35. An implantable medical device, comprising:
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means for stimulating heart tissue and sensing cardiac signals; means for controlling timing of the stimulation of heart tissue and measuring intervals between the sensed cardiac signals; means for determining heart rate variability in response to the intervals; means for comparing the determined heart rate variability to a predetermined target rate profile; means for adjusting a parameter from a first setting to a second setting different from the first setting in response to the comparing of the determined heart rate variability and the predetermined target rate profile, and adjusting the parameter from the second setting to a termination setting in response to expiration of a first predetermined time period; means for selecting a first exercise time profile from stored exercise time profiles in response to the comparison of the determined heart rate variability to the predetermined target rate profile, each of the stored exercise time profiles including an acceleration portion corresponding to adjusting the parameter from the first setting to the second setting, a steady-state portion corresponding to the first predetermined time period, and a deceleration portion corresponding to adjusting the parameter from the second setting to the termination setting, wherein the adjusting means adjusts the parameter from the second setting to the termination setting, prior to expiration of the first predetermined time period, in response to detecting one of a programming session, a magnet, a cardiac arrhythmia, spontaneous rate greater than the second setting, and rate response greater than the second setting. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification