Cardiac signal QT interval detection
AssigneeMedtronic, Inc.
InventorsGautham Rajagopal, Shantanu Sarkar
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Abstract
An example device for detecting one or more parameters of a cardiac signal is disclosed herein. The device includes one or more electrodes and sensing circuitry configured to sense a cardiac signal via the one or more electrodes. The device further includes processing circuitry configured to determine an R-wave of the cardiac signal and determine whether the R-wave is noisy. Based on the R-wave being noisy, the processing circuitry is configured to determine whether the cardiac signal around a determined T-wave is noisy. Based on the cardiac signal around the determined T-wave not being noisy, the processing circuitry is configured to determine a QT interval or a corrected QT interval based on the determined T-wave and the determined R-wave.
Claims21
An implantable medical device comprising:
- a housing configured to be implanted within a patient;
- a plurality of electrodes;
- sensing circuitry disposed within the housing configured to sense a cardiac signal based on electrical activity of a heart of the patient via the plurality of electrodes;
- and
- processing circuitry configured to:
- determine an R-wave of the cardiac signal;
- determine one or more RR intervals, wherein the one or more RR intervals comprise at least one of a previous RR interval associated with the determined R-wave or a current RR interval associated with the determined R-wave;
- determine a T-wave of the cardiac signal based on filtering at least a portion of the one or more RR intervals of the cardiac signal;
- determine at least one of a QT interval or a QTc interval based on the determined T-wave and the determined R-wave;
- and
- at least one of predict or detect an abnormal cardiac rhythm based at least in part on the at least one of the QT interval or the corrected QT interval.
A computing device comprising:
- communication circuitry configured to receive a cardiac signal from an implantable medical device having a housing, a plurality of electrodes, and sensing circuitry disposed within the housing configured to sense the cardiac signal based on electrical activity of a heart of a patient via the plurality of electrodes;
- and
- processing circuitry configured to:
- determine an R-wave of the cardiac signal;
- determine one or more RR intervals, wherein the one or more RR intervals comprise at least one of a previous RR interval associated with the determined R-wave or a current RR interval associated with the determined R-wave;
- determine a T-wave of the cardiac signal based on filtering at least a portion of the one or more RR intervals of the cardiac signal;
- determine at least one of a QT interval or a QTc interval based on the determined T-wave and the determined R-wave;
- and
- at least one of predict or detect an abnormal cardiac rhythm based at least in part on the at least one of the QT interval or the corrected QT interval.
Non-transitory, computer-readable storage media storing a set of instructions that, when executed, cause processing circuitry to:
- determine an R-wave of a cardiac signal, the cardiac signal being sensed by a plurality of electrodes of an implantable medical device comprising a housing, and sensing circuitry disposed within the housing configured to sense the cardiac signal based on electrical activity of a heart of a patient via the plurality of electrodes;
- determine one or more RR intervals, wherein the one or more RR intervals comprise at least one of a previous RR interval associated with the determined R-wave or a current RR interval associated with the determined R-wave;
- determine a T-wave of the cardiac signal based on at least a portion of the one or more RR intervals of the cardiac signal;
- determine at least one of a QT interval or a QTc interval based on the determined T-wave and the determined R-wave;
- and
- at least one of predict or detect an abnormal cardiac rhythm based at least in part on the at least one of the QT interval or the corrected QT interval.
Dependencies are inferred from the claim text.