Cardiac signal display and event detection using multiresolution Z-score transform
First Claim
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1. A method comprising:
- sensing at least one time-varying physiologic sensor signal using an implantable sensor;
sampling the sensor signal to obtain sensor data;
calculating a multi-resolution Z-score transformation (ZST) of the sensor data by;
calculating a ZST over a first data segment length of a sensor signal to obtain a first resolution ZST region; and
calculating at least a second ZST over a second data segment length of the sensor signal to obtain at least a second resolution ZST region, wherein at least a portion of the second segment overlaps the first segment, and wherein the second resolution is different than the first resolution; and
displaying the multi-resolution ZST.
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Abstract
A system comprising a medical device including a processor and a Z-score transformation (ZST) module. The system also includes a display in communication with the processor. The processor is adapted to receive sensor data obtained from at least first and second sensors adapted to produce a time-varying physiologic electrical sensor signal. At least one of the first and second sensors is implantable. The ZST module calculates a ZST for the sensor data received from the first sensor and a ZST for the sensor data received from the second sensor. The display is adapted to display the ZSTs in visual correspondence with each other over time.
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Citations
20 Claims
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1. A method comprising:
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sensing at least one time-varying physiologic sensor signal using an implantable sensor; sampling the sensor signal to obtain sensor data; calculating a multi-resolution Z-score transformation (ZST) of the sensor data by; calculating a ZST over a first data segment length of a sensor signal to obtain a first resolution ZST region; and calculating at least a second ZST over a second data segment length of the sensor signal to obtain at least a second resolution ZST region, wherein at least a portion of the second segment overlaps the first segment, and wherein the second resolution is different than the first resolution; and displaying the multi-resolution ZST. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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sensing a first time-varying physiologic sensor signal and sensing at least a second time-varying physiologic sensor signal, wherein at least one of the first and second sensor signals is obtained from an implantable sensor; sampling the first and second sensor signals to obtain first sensor data and second sensor data; calculating a Z-score transformation (ZST) for the first sensor data and a ZST for the second sensor data including; calculating a ZST over a first data segment length of at least one of the first or second sensor data to obtain a first resolution ZST region; and calculating at least a second ZST over a second data segment length of the same first or second sensor data to obtain at least a second resolution ZST region wherein at least a portion of the second segment overlaps the first segment, and wherein the second resolution is different than the first resolution; and displaying the ZSTs in visual correspondence with each other over time. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification