Cardiac waveform template creation, maintenance and use
First Claim
1. A method of operating an implantable cardiac device comprising:
- associating one or more target region attributes with each of a plurality of target regions, the one or more target region attributes including at least sampling rate and each target region having a location, a time dimension, and an amplitude dimension;
detecting a cardiac waveform feature;
adjusting at least one target region of the plurality of target regions based on a location of the detected feature of the cardiac waveform and compatibility between the attributes of the at least one target region and attributes of the waveform feature;
delivering a cardiac pacing pulse during a cardiac cycle;
detecting a subsequent cardiac waveform after delivery of the pacing pulse;
determining a cardiac pacing response to the pacing pulse based on whether features of the subsequent cardiac waveform fall within the plurality of target regions; and
adjusting a pacing energy of the cardiac device based on the cardiac pacing response.
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Abstract
The present disclosure describes methods and systems for creating, adjusting, and using cardiac waveform morphology templates. The morphology templates include target regions associated with features of cardiac waveforms. The target regions may be adjusted based on relationships between the target regions and features of detected cardiac waveforms associated with the target regions. The templates may be used to analyze cardiac waveforms to classify or monitor various waveform morphologies. Templates may be created or eliminated based on a frequency of use. According to one approach, template creation involves providing target regions defined by one or more characteristics. The target regions are adjusted based on detected cardiac waveform features having similar characteristics. A template may be created using the target regions adjusted by this process.
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Citations
20 Claims
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1. A method of operating an implantable cardiac device comprising:
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associating one or more target region attributes with each of a plurality of target regions, the one or more target region attributes including at least sampling rate and each target region having a location, a time dimension, and an amplitude dimension; detecting a cardiac waveform feature; adjusting at least one target region of the plurality of target regions based on a location of the detected feature of the cardiac waveform and compatibility between the attributes of the at least one target region and attributes of the waveform feature; delivering a cardiac pacing pulse during a cardiac cycle; detecting a subsequent cardiac waveform after delivery of the pacing pulse; determining a cardiac pacing response to the pacing pulse based on whether features of the subsequent cardiac waveform fall within the plurality of target regions; and adjusting a pacing energy of the cardiac device based on the cardiac pacing response. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An implantable cardiac device, comprising:
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pacing therapy circuitry configured to deliver a pacing pulse to a heart during each of a plurality of cardiac cycles; sensing circuitry configured to sense a cardiac waveform after delivery of each pacing pulse; and a control system configured to associate and provide one or more target region attributes with each of a plurality of target regions, the one or more target region attributes including at least sampling rate, each target region having a location, a time dimension, and an amplitude dimension, the control system configured to adjust at least one target region of the plurality of target regions based on a location of at least one sensed cardiac waveform feature and compatibility between attributes of the at least one target region and attributes of the at least one sensed cardiac waveform feature, the control system configured to, for a subsequent cardiac cycle, determine if features of a subsequently sensed cardiac waveform fall within the plurality of target regions and to determine the cardiac pacing response based on whether the cardiac waveform features of the subsequently sensed cardiac waveform fall within the plurality of target regions. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. An implantable medical device, comprising:
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means for associating and providing one or more target region attributes with each of a plurality of target regions, the one or more target region attributes including at least sampling rate and each target region having a location, a time dimension, and an amplitude dimension; means for detecting a cardiac waveform feature; means for adjusting at least one target region of the plurality of target regions based on a location of the detected cardiac waveform feature and compatibility between attributes of the at least one target region and attributes of the cardiac waveform feature; means for delivering-a cardiac pacing pulse during a cardiac cycle; means for detecting features of a subsequent cardiac waveform after delivery of the pacing pulse; means for determining a cardiac pacing response to the pacing pulse based on whether features of the subsequent cardiac waveform fall within the plurality of target regions; and means for adjusting a pacing energy of the cardiac device based on the cardiac pacing response.
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Specification