US 12,751,659 B2Granted

Method and system for identifying disconnected catheter electrode

AssigneeBiosense Webster (Israel) Ltd.

InventorsVadim Gliner, Assaf Govari, Uri Avni

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Abstract

A method, apparatus and computer program product, the method comprising: obtaining a plurality of electrical signals obtained from a plurality of electrodes distally disposed on a catheter inserted into one or more chambers of a heart of a patient, wherein one or more electrical signals obtained from one or more electrodes of the plurality of electrodes obtains electrical activity in one or more locations within the heart; identifying one or more signals from the plurality of electrical signals as being emitted from one or more disconnected electrode, said identifying utilizing a correlation with a reference signal measured within the heart, wherein the reference signal is associated with a reference electrode; and generating a map of electrical activity within the heart based upon the plurality of electrical signals, excluding one or more electrical signals originating from the disconnected electrodes.

Claims11

Dependent claims

A method of identifying a disconnected Intracardiac Electrogram (IEGM) electrode on a catheter while mapping electrical activity of a heart chamber of a patient, wherein the catheter includes a plurality of IEGM electrodes and a reference electrode, wherein the reference electrode is configured to be maintained within a blood pool of the heart chamber and the plurality of IEGM electrodes is configured to make contact with a wall of the heart chamber while the catheter is positioned within the heart chamber, the method comprising:

simultaneously sampling IEGM outputs from the plurality of IEGM electrodes and reference output from the reference electrode;
computing correlations between the IEGM outputs and the reference output;
determining correlation coefficients for the plurality of IEGM electrodes based on the computing;
identifying that a first IEGM electrode from the plurality of IEGM electrodes has a break in electrical connection within the catheter based on identifying a correlation coefficient of a correlation between output from the first IEGM electrode and the reference output is between −0.9 and −1;
and
updating a pool of the IEGM outputs applied to compute an electroanatomic map by removing the IEGM output from the first IEGM electrode from the pool of the IEGM outputs;
and
computing a map of electrical activity within the heart chamber based on the updated pool of the IEGM outputs;
and
rending the map on a display.

7 more elements

A computerized apparatus configured for identifying a disconnected IEGM electrode on a catheter that is mapping electrical activity of a heart chamber of a patient, wherein the catheter includes a plurality of Intracardiac Electrogram (IEGM) electrodes and a reference electrode, wherein the reference electrode is configured to be maintained within a blood pool of the heart chamber and the plurality of IEGM electrodes is configured to make contact with a wall of the heart chamber while the catheter is positioned within the heart chamber, the apparatus comprising:

a processor coupled with a memory unit, the processor being adapted to perform the steps of:
receiving IEGM outputs from the plurality of IEGM electrodes and reference output from the reference electrode, wherein the IEGM outputs and the reference output are simultaneously sampled;
computing correlations between the IEGM outputs and the reference output;
determining correlation coefficients for the plurality of IEGM electrodes based on the computing;
identifying that a first IEGM electrode from the plurality of IEGM electrodes has a break in electrical connection within the catheter based on identifying a correlation coefficient of a correlation between an IEGM output from the first IEGM electrode and the reference output is between −0.9 and −1;
and
updating a pool of the IEGM outputs applied to compute an electroanatomic map by removing the IEGM output from the first IEGM electrode from the pool of the IEGM outputs;
and
computing a map of electrical activity within the heart chamber based on the updated pool of the IEGM outputs;
and
rendering the map on a display.

8 more elements

Dependencies are inferred from the claim text.