Implantable cardiac disease management device with trigger-stored polysomnogram and phonocardiogram
First Claim
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1. An implantable medical device comprising:
- a) a microprocessor-based controller;
b) a memory controlled by the microprocessor-based controller;
c) means for sensing variations in transthoracic impedance due to respiratory related activity; and
d) means responsive to detection of a predetermined respiratory pattern for storing data pertaining to the sensed respiratory related activity in the memory.
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Abstract
Currently, brady, tachy and CRT devices all provide stored electrograms that record ambulatory electrograms with programmable trigger mechanisms. The present invention comprises an implantable device with additional capability that can store polysomnograms and phonocardiograms. The polysomnograms can be obtained from an impendent sensor of the type used in minute ventilation-based rate-adaptive pacemakers. The phonocardiograms are obtained from an accelerometer transducer or other type sensors that can detect heart sound.
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Citations
6 Claims
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1. An implantable medical device comprising:
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a) a microprocessor-based controller;
b) a memory controlled by the microprocessor-based controller;
c) means for sensing variations in transthoracic impedance due to respiratory related activity; and
d) means responsive to detection of a predetermined respiratory pattern for storing data pertaining to the sensed respiratory related activity in the memory. - View Dependent Claims (2, 3, 4)
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5. A method of storing polysomnograph data in a memory of an implantable medical device comprising the steps of:
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a) implanting in a patient a medical device having a controller with a memory for storing data and at least one sensor for detecting variations in transthoracic impedance relating to respiratory activity and producing an electrical signal proportional to said variations;
b) detecting a predetermined event; and
c) storing polysomnograph data derived from the detected respiratory activity in the memory upon detection of said predetermined event. - View Dependent Claims (6)
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Specification