Dynamic patient-specific filtering of an activity signal within a beating heart
First Claim
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1. An implantable medical device, comprising:
- an activity sensor configured to produce a signal correlated to a metabolic demand of a patient;
a pulse generator configured to generate and deliver pacing pulses to a patient'"'"'s heart via a pair of electrodes coupled to the implantable medical device; and
a control module coupled to the pulse generator and the activity sensor and configured to;
determine a first plurality of activity metrics from the activity sensor signal,determine an activity metric value at a predetermined percentile of the first plurality of activity metrics,set an adjustable lower rate set point based on the activity metric value at the predetermined percentile,determine a next activity metric from the activity sensor signal,set a sensor indicated pacing rate to be greater than a lower base pacing rate in response to at least the next activity metric being greater than the adjustable lower rate set point, andcontrol the pulse generator to deliver cardiac pacing pulses at the sensor indicated rate.
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Abstract
An implantable medical device includes an activity sensor, a pulse generator, and a control module. The control module is configured to determine activity metrics from the activity signal and determine an activity metric value at a predetermined percentile of the activity metrics. The control module sets a lower pacing rate set point based on the activity metric value at the predetermined percentile.
116 Citations
15 Claims
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1. An implantable medical device, comprising:
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an activity sensor configured to produce a signal correlated to a metabolic demand of a patient; a pulse generator configured to generate and deliver pacing pulses to a patient'"'"'s heart via a pair of electrodes coupled to the implantable medical device; and a control module coupled to the pulse generator and the activity sensor and configured to; determine a first plurality of activity metrics from the activity sensor signal, determine an activity metric value at a predetermined percentile of the first plurality of activity metrics, set an adjustable lower rate set point based on the activity metric value at the predetermined percentile, determine a next activity metric from the activity sensor signal, set a sensor indicated pacing rate to be greater than a lower base pacing rate in response to at least the next activity metric being greater than the adjustable lower rate set point, and control the pulse generator to deliver cardiac pacing pulses at the sensor indicated rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification