Rate-adaptive therapy with sensor cross-checking
First Claim
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1. A system, comprising:
- an exertion level sensor;
an activity level sensor; and
a processor coupled to the exertion level sensor and the activity level sensor, the processor programmed to estimate a maximum exercise capacity by determining a maximum exertion level from exertion levels measured by the exertion level sensor and cross-checking the maximum exertion level with an activity level measured by the activity level sensor, the activity level associated with the maximum exertion level.
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Abstract
A method and system for automatically adjusting the operating parameters of a rate-adaptive cardiac pacemaker in which maximum exertion levels attained by the patient are measured at periodic intervals and stored in order to compute or update a maximum exercise capacity. The slope of the rate-response curve is then adjusted to map an exertion level corresponding to the updated maximum exercise capacity to a maximum allowable pacing rate. In accordance with the invention, a maximum exercise capacity is determined by cross-checking periodic maximum exertion level sensor values with a motion-level sensor value.
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Citations
28 Claims
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1. A system, comprising:
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an exertion level sensor;
an activity level sensor; and
a processor coupled to the exertion level sensor and the activity level sensor, the processor programmed to estimate a maximum exercise capacity by determining a maximum exertion level from exertion levels measured by the exertion level sensor and cross-checking the maximum exertion level with an activity level measured by the activity level sensor, the activity level associated with the maximum exertion level. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method, comprising:
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measuring exertion levels;
measuring activity levels;
determining a resting exertion level from the measured exertion levels;
determining a maximum exertion level from the measured exertion levels;
associating the maximum exertion level with a corresponding activity level;
estimating a maximum exercise capacity by cross-checking the maximum exertion level with the corresponding activity level; and
adjusting a response factor based on the estimated maximum exercise capacity and the resting exertion level, the response factor being a slope of a rate-response curve in a rate-adaptive cardiac pacing mode. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system comprising:
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means for measuring exertion levels and determining a periodic maximum exertion level;
means for measuring activity levels and associating the periodic maximum exertion level with a corresponding activity level measurement; and
means for estimating a maximum exercise capacity by cross-checking the periodic maximum exertion level with the corresponding activity level measurement. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification