Method and apparatus for noise rejection in atrial arrhythmia detection
AssigneeMedtronic, Inc.
InventorShantanu Sarkar
Life of this patent
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Abstract
A medical device performs a method for determining a cardiac event by obtaining a signal comprising cardiac cycle length information in a patient and determining cardiac cycle lengths during an established time interval. Noise is detected during the time interval and a cardiac cycle length corresponding to a time of the detected noise is rejected. Cycle length differences are determined from the cycle lengths not rejected during the time interval. The cardiac event is determined in response to the cycle length differences.
Claims21
A method for determining a cardiac event, comprising:
- obtaining a signal comprising cardiac cycle length information in a patient;
- determining cardiac cycle lengths from the signal during an established time interval;
- detecting signal noise during the time interval;
- rejecting a cardiac cycle length corresponding to a time of the detected noise;
- determining a plurality of cycle length differences in response to only the cycle lengths not rejected during the time interval;
- and
- determining the cardiac event in response to the determined cycle length differences.
A medical device for determining a cardiac event, comprising:
- a sensor to sense a signal comprising cardiac cycle length information in a patient;
- and
- a processor to receive the signal and configured to
- determine cardiac cycle lengths during an established time interval,
- detect signal noise during the time interval,
- reject a cardiac cycle length corresponding to a time of the detected noise,
- determine a plurality of cycle length differences from the cycle lengths not rejected during the time interval, and
- determine the cardiac event in response to the determined cycle length differences.
A computer-readable medium storing a set of instructions which cause a processor of an implantable medical device to perform a method comprising:
- obtaining a signal comprising cardiac cycle length information in a patient;
- determining cardiac cycle lengths from the signal during an established time interval;
- detecting signal noise during the time interval;
- rejecting a cardiac cycle length corresponding to a time of the detected noise;
- determining a plurality of cycle length differences in response to only the cycle lengths not rejected during the time interval;
- and
- determining the cardiac event in response to the determined cycle length differences.
Dependencies are inferred from the claim text.