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;
- a control circuit configured to:
- determine, based on the accelerometer signal, an activity metric over a time period;
- filter, from the activity metric determined over the time period, a portion of the activity metric expected to correspond to heart motion when the patient is at rest;
- determine, based on the filtered activity metric, a pacing set point;
- and
- cause a pulse generator to generate pacing pulses at the pacing set point.
A method comprising:
- determining, by a control circuit of an implantable cardiac device based on an accelerometer signal, an activity metric over a time period, wherein the implantable cardiac device comprises a housing configured to be implanted within a heart of a patient, and wherein the implantable cardiac device comprises an accelerometer positioned within the housing, the accelerometer configured to generate the accelerometer signal;
- filtering, by the control circuit from the activity metric determined over the time period, a portion of the activity metric expected to correspond to heart motion when the patient is at rest;
- determining, by the control circuit based on the filtered activity metric, a pacing set point;
- and
- causing, by the control circuit, a pulse generator to generate pacing pulses at the pacing set point.
A non-transitory computer-readable medium configured to store instructions that, when executed, cause one or more processors to:
- determine, based on an accelerometer signal generated by an accelerometer positioned within a housing of an implantable cardiac device, an activity metric over a time period, wherein the housing is configured to be implanted within the heart of the patient;
- filter, from the activity metric determined over the time period, a portion of the activity metric expected to correspond to heart motion when the patient is at rest;
- determine, based on the filtered activity metric, a pacing set point;
- and
- cause a pulse generator to generate pacing pulses at the pacing set point.
Dependencies are inferred from the claim text.