METHOD AND SYSTEM FOR IMPROVING IMPEDANCE DATA QUALITY IN THE PRESENCE OF PACING PULSES

摘要

An implantable medical device, comprised of at least one lead configured to be located proximate to a heart, the at least one lead including electrodes, at least a portion of the electrodes configured to sense cardiac activity. A therapy module configured to control delivery of pacing pulses in accordance with a therapy timing and based on the cardiac sensed activity sensed. Cardiac impedance (CI) sensor circuitry configured to be coupled to at least a first combination of the electrodes to sense cardiac impedance (CI), the CI sensor circuitry generating an impedance data stream associated with a corresponding CI sensing vector.

主权项

1. An implantable medical device, comprising:
at least one lead configured to be located proximate to a heart, the at least one lead including electrodes, at least a portion of the electrodes configured to sense cardiac activity; a therapy module configured to control delivery of pacing pulses in accordance with a therapy timing and based on the cardiac activity sensed; cardiac impedance (CI) sensor circuitry configured to be coupled to at least a first combination of the electrodes to sense cardiac impedance (CI), the CI sensor circuitry generating an impedance data stream associated with a corresponding CI sensing vector; and a CI module configured to manage the CI sensor circuitry to collect impedance data during active CI collection windows; an artifact reduction (AR) module configured to at least one of:
A) manage at least one of i) the therapy timing of the therapy module and ii) the active CI collection windows, to avoid delivery of the pacing pulses during the active CI collection windows during which the CI sensor circuitry collects impedance data; andB) identify a reconstruction region in the impedance data and reconstruct a sample sub-set of the impedance data that occurs during the reconstruction region to at least partially remove artifacts in the impedance data stream associated with a pacing pulse.