US 2009/0157134 A1 · Device For Characterizing the Cardiac Status Of A Patient Equipped With A Biventricular Pacing Active Implant

Abstract

A medical device for characterizing the cardiac status of a patient equipped with a bi-ventricular pacing active implant device. The implant collects an endocardiac acceleration signal and searches for an optimal pacing configuration. This latter tests a plurality of different pacing configurations and delivers for each tested configuration parameters derived from the endocardiac acceleration peak (PEA). The device derives a patient clinical status from those parameters, the indication being representative of the patient's response to the cardiac resynchronization therapy. Those parameters include: the possibility to automatically get or not a valid optimal AV Delay among all the biventricular pacing configurations; a factor indicating the character sigmoid of the PEA/AVD characteristic; the average value of the PEA for the various configurations; and the PEA signal/noise ratio. The active implantable medical device includes control software and processes for executing the characterizing functionality described.

Claims24

Dependent claims

A medical device for characterizing cardiac status of a patient equipped with an active implant having a biventricular cardiac resynchronization therapy, comprising:

means for bi-ventricular pacing at selected ones of a plurality of sites;
means for collecting an endocardiac acceleration signal (EA);
means for testing a plurality of different pacing configurations by changing at least one of the selected sites, a pacing pulse sequence applied to the selected sites, and a time interval between the application of the pacing pulses to the selected sites,
means for searching for an optimal pacing configuration using said testing means for each tested pacing configuration, delivering a plurality of parameters derived from one of the two endocardiac acceleration peaks (PEA1, PEA2) that appear respectively during the iso-volumetric and during the iso-volumetric ventricular relaxation;
and
means for characterizing a patient cardiac status comprising:
means for analyzing said plurality of parameters and deriving a corresponding plurality of different respective specific indications, and
means for combining said specific indications in a composite indication of the patient clinical status representative of the patient response to the cardiac resynchronization therapy.

5 more elements

A software control module for processing signals and characterizing a cardiac status of a patient equipped with an active implant having a biventricular cardiac resynchronization therapy, comprising:

a first instruction set for receiving data corresponding to an endocardiac acceleration signal (EA) and determining a peak endocardiac acceleration (PEA) value including at least one of a first endocardiac acceleration peak (PEAL) and a second peak endocardiac acceleration (PEA2) that appear respectively during the iso-volumetric and during the iso-volumetric ventricular relaxation;
a second instruction set for testing a plurality of different biventricular pacing configurations by changing at least, one of (i) a plurality of selected pacing sites, (ii) a pacing pulse sequence applied to the selected sites, and (iii) a time interval between the application of the pacing pulses to the selected sites,
a third instruction set for searching for an optimal pacing configuration using said results for each tested pacing configuration, and generating a plurality of parameters derived from one of the said two endocardiac acceleration peaks (PEA1, PEA2);
and
a fourth instruction set for characterizing a patient cardiac status by:
analyzing said plurality of parameters and deriving a corresponding plurality of different respective specific indications, and
combining said specific indications in a composite indication of the patient clinical status representative of the patient response to the cardiac resynchronization therapy.

4 more elements

Dependencies are inferred from the claim text.

Device For Characterizing the Cardiac Status Of A Patient Equipped With A Biventricular Pacing Active Implant

Life of this patent

Device For Characterizing the Cardiac Status Of A Patient Equipped With A Biventricular Pacing Active Implant

Life of this patent

Abstract

Claims24