System and method for controlling the recording of diagnostic medical data in an implantable medical device
First Claim
1. A method for controlling the storing and recording of diagnostic data within an implantable medical device having a temporary memory and a long-term memory, the method comprising:
- monitoring cardiac rhythm through the implantable medical device;
evaluating the cardiac rhythm to determine the likelihood that a cardiac arrhythmia will arise;
controlling the storing and recording of diagnostic data associated with the cardiac rhythm such that no diagnostic data is stored in the implantable temporary memory until it has been determined that a cardiac arrhythmia is likely to arise;
if it is determined that a cardiac arrhythmia is likely to arise, evaluating the cardiac rhythm to determine if a cardiac arrhythmia did actually occur; and
controlling the storing and recording of diagnostic data associated with the cardiac rhythm such that no diagnostic data is transferred from the implantable temporary memory and recorded in the implantable long-term memory until it has been determined that a cardiac arrhythmia did actually occur.
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Accused Products
Abstract
Techniques are provided for controlling the recording of diagnostic data, such as intracardiac electrogram (IEGM) data, so as to reduce device power consumption. In one technique, the risk of onset of an arrhythmia is evaluated and the recording of diagnostic data is then selectively controlled based upon the evaluation. More specifically, a temporary “pre-trigger” memory for recording IEGM data is activated only at times when there is a significant risk that an arrhythmia will actually occur. Power savings are thereby achieved as compared to devices that require the pre-trigger memory to be continuously active. In another technique, parameters employed to trigger the recording of diagnostic data are adaptively modified to reduce the likelihood of any unnecessary recording of such data. Preferably, both the risk-based techniques and the adaptive techniques are implemented in the same system.
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Citations
20 Claims
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1. A method for controlling the storing and recording of diagnostic data within an implantable medical device having a temporary memory and a long-term memory, the method comprising:
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monitoring cardiac rhythm through the implantable medical device; evaluating the cardiac rhythm to determine the likelihood that a cardiac arrhythmia will arise; controlling the storing and recording of diagnostic data associated with the cardiac rhythm such that no diagnostic data is stored in the implantable temporary memory until it has been determined that a cardiac arrhythmia is likely to arise; if it is determined that a cardiac arrhythmia is likely to arise, evaluating the cardiac rhythm to determine if a cardiac arrhythmia did actually occur; and controlling the storing and recording of diagnostic data associated with the cardiac rhythm such that no diagnostic data is transferred from the implantable temporary memory and recorded in the implantable long-term memory until it has been determined that a cardiac arrhythmia did actually occur. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for controlling the storing and recording of diagnostic data within an implantable medical device having a temporary memory and a long-term memory, the method comprising:
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monitoring cardiac rhythm through the implantable medical device; evaluating the cardiac rhythm to determine the likelihood that a cardiac arrhythmia will arise; controlling the storing and recording of diagnostic data associated with the cardiac rhythm such that no diagnostic data is stored in the implantable temporary memory until it has been determined that a cardiac arrhythmia is likely to arise; determining whether the cardiac arrhythmia actually occurred; and adaptively modifying parameters employed to evaluate the likelihood of such cardiac arrhythmia so as to reduce unnecessary storing of diagnostic data in the temporary memory.
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19. An implantable medical device comprising:
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a device operative to monitor cardiac rhythm; an implantable temporary memory operative to store diagnostic medical data; an implantable long-term memory operative to record the diagnostic medical data stored in the temporary memory; and a risk-based diagnostic data controller operative to evaluate the cardiac rhythm to determine the likelihood that a cardiac arrhythmia will arise and to control the storing and recording of diagnostic data such that no diagnostic data is stored in the temporary memory until it has been determined that a cardiac arrhythmia is likely to arise, and if it is determined that a cardiac arrhythmia is likely to arise, to evaluate the cardiac rhythm to determine if a cardiac arrhythmia did actually occur and to control the storing and recording of diagnostic data such that no diagnostic data is transferred from the implantable temporary memory and recorded in the implantable long-term memory until it has been determined that a cardiac arrhythmia did actually occur.
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20. An implantable medical device comprising:
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means for monitoring cardiac rhythm through the implantable medical device implantable means for temporarily storing data; implantable means for recording the temporarily stored data; means for evaluating the cardiac rhythm to determine the likelihood that a cardiac arrhythmia will arise and if it is determined that a cardiac arrhythmia is likely to arise, evaluating the cardiac rhythm to determine if a cardiac arrhythmia did actually occur; and means for controlling the storing and recording of diagnostic data within the means for temporarily storing data and means for recording the temporarily stored data such that no diagnostic data is stored in the means for temporarily storing data until it has been determined that a cardiac arrhythmia is likely to arise and no diagnostic data is transferred from the implantable temporary memory and recorded in the implantable long-term memory until it has been determined that a cardiac arrhythmia did actually occur.
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Specification