Means to check the validity of heart failure surrogate parameters from evoked response using 3-D accelerometer queue
First Claim
1. An implantable cardiac pacemaker device for detecting heart failure comprising:
- a three-dimensional accelerometer; and
a means for ensuring the validity of heart failure surrogate parameters from an evoked response using the three-dimensional accelerometer.
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Accused Products
Abstract
In one implementation, a method is provided for detecting heart failure which includes retrieving a three-dimensional posture template corresponding to a normal evoked response. The method further includes capturing an intracardiac electrogram of an evoked response and detecting a three-dimensional posture corresponding with the intracardiac electrogram. The detected three-dimensional posture and the three-dimensional posture template are compared. The captured intracardiac electrogram is used for heart failure trend analysis if the comparison of the detected three-dimensional posture and the three-dimensional posture template indicates a same posture.
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Citations
23 Claims
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1. An implantable cardiac pacemaker device for detecting heart failure comprising:
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a three-dimensional accelerometer; and a means for ensuring the validity of heart failure surrogate parameters from an evoked response using the three-dimensional accelerometer. - View Dependent Claims (2, 3, 4)
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5. A method for detecting heart failure comprising:
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a) capturing an intracardiac electrogram of an evoked response; b) detecting a three-dimensional posture corresponding with the captured intracardiac electrogram; c) retrieving a three-dimensional posture template; d) comparing the detected three-dimensional posture and the three-dimensional posture template; and e) using the captured intracardiac electrogram for heart failure trend analysis if the comparison of the detected three-dimensional posture and the three-dimensional posture template indicates a same posture. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for detecting heart failure comprising:
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a) storing a patient position associated with an evoked response parameter; b) detecting a subsequent evoked response parameter; c) detecting a patient position corresponding to the detected evoked response; d) comparing the detected patient position with the stored patient position; and e) including the detected evoked response parameter in heart failure trend analysis if the detected patient position indicates a same posture as the stored patient position associated with the normal evoked response. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification