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US 2026/0284411 A1Published application
Dynamic patient-specific filtering of an activity signal within a beating heart
AssigneeMedtronic, Inc.
InventorsTodd J. Sheldon, Wade M. Demmer, Karen J. Kleckner, Douglas A. Peterson, Paul R. Solheim
Life of this patent
Estimating the term…
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.
Claims20
An implantable cardiac device comprising:
- a housing configured to be implanted within a heart of a patient;
- an accelerometer positioned within the housing, the accelerometer configured to generate an accelerometer signal;
- and
- a control circuit configured to:
- determine, based on the accelerometer signal, a first plurality of activity counts over a first time period;
- determine a first number of activity counts of the first plurality of activity counts that are greater than a lower rate set point;
- compare the first number of activity counts to an expected number of activity counts;
- adjust the lower rate set point based on the comparison of the first number of activity counts to the expected number of activity counts;
- determine, based on the accelerometer signal, a second plurality of activity counts over a second time period, wherein the second time period is after the first time period;
- determine a pacing rate based on the second plurality of activity counts and the lower rate set point;
- and
- cause a pulse generator to generate pacing pulses at the pacing rate.
9 more elements
A method comprising:
- determining, by a control circuit of an implantable cardiac device based on an accelerometer signal, a first plurality of activity counts over a first time period, wherein the implantable cardiac device comprises:
- a housing configured to be implanted within a heart of a patient, and
- an accelerometer positioned within the housing configured to generate the accelerometer signal;
- determining, by the control circuit, a first number of activity counts of the first plurality of activity counts that are greater than a lower rate set point;
- comparing, by the control circuit, the first number of activity counts to an expected number of activity counts;
- adjusting, by the control circuit, the lower rate set point based on the comparison of the first number of activity counts to the expected number of activity counts;
- determining, by the control circuit based on the accelerometer signal, a second plurality of activity counts over a second time period, wherein the second time period is after the first time period;
- determining, by the control circuit, a pacing rate based on the second plurality of activity counts and the lower rate set point;
- and
- causing, by the control circuit, a pulse generator to generate pacing pulses at the pacing rate.
7 more elements
A non-transitory computer-readable medium storing instructions that, when executed by processing circuitry, cause the processing circuitry to:
- determine, based on an accelerometer signal of an implantable cardiac device, a first plurality of activity counts over a first time period, wherein the implantable cardiac device comprises:
- a housing configured to be implanted within a heart of a patient, and
- an accelerometer positioned within the housing configured to generate the accelerometer signal;
- determine a first number of activity counts of the first plurality of activity counts that are greater than a lower rate set point;
- compare the first number of activity counts to an expected number of activity counts;
- adjust the lower rate set point based on the comparison of the first number of activity counts to the expected number of activity counts;
- determine, based on the accelerometer signal, a second plurality of activity counts over a second time period, wherein the second time period is after the first time period;
- determine a pacing rate based on the second plurality of activity counts and the lower rate set point;
- and
- cause a pulse generator to generate pacing pulses at the pacing rate.
7 more elements
Dependencies are inferred from the claim text.