Apparatus and Method for Detecting Cardiac Events
First Claim
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1. A method for monitoring of cardiac conditions incorporating an implantable medical device in a subject, the method comprising the steps of:
- collecting physiological data associated with the subject from the implantable device, wherein the collected data includes real-time electrocardiac signal data, heart sound data, activity level data and tissue perfusion data;
comparing the electrocardiac signal data with a threshold electrocardiac criteria for indicating a strong likelihood of a cardiac event;
triggering an alarm state if the electrocardiac signal data is not within the threshold electrocardiac criteria;
determining the current activity level of the subject from the activity level data if the electrocardiac signal data is within the threshold electrocardiac criteria;
comparing the tissue perfusion data with a threshold tissue perfusion criteria for indicating a strong likelihood of a cardiac event if the current activity level is below a threshold activity level;
triggering an alarm state if the threshold tissue perfusion data is not within the threshold tissue perfusion criteria; and
triggering an alarm state if the threshold tissue perfusion data is within the threshold tissue perfusion criteria and the heart sound data indicates that S3 and S4 heart sounds are detected,wherein if an alarm state is not triggered, the physiological data associated with the subject is collected at the expiration of a preset period of time.
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Abstract
A method and system which includes a minimally invasive, implantable device with a sensor configured for collecting electrical data associated with cardiac performance, a sensor configured for collecting mechanical data associated with cardiac performance, a sensor for collecting optical data associated with cardiac performance, a sensor for collecting biochemical data associated with cardiac performance, and a processor for deriving cardiac conditions and actuating an alarm upon identifying a cardiac event.
91 Citations
19 Claims
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1. A method for monitoring of cardiac conditions incorporating an implantable medical device in a subject, the method comprising the steps of:
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collecting physiological data associated with the subject from the implantable device, wherein the collected data includes real-time electrocardiac signal data, heart sound data, activity level data and tissue perfusion data; comparing the electrocardiac signal data with a threshold electrocardiac criteria for indicating a strong likelihood of a cardiac event; triggering an alarm state if the electrocardiac signal data is not within the threshold electrocardiac criteria; determining the current activity level of the subject from the activity level data if the electrocardiac signal data is within the threshold electrocardiac criteria; comparing the tissue perfusion data with a threshold tissue perfusion criteria for indicating a strong likelihood of a cardiac event if the current activity level is below a threshold activity level; triggering an alarm state if the threshold tissue perfusion data is not within the threshold tissue perfusion criteria; and triggering an alarm state if the threshold tissue perfusion data is within the threshold tissue perfusion criteria and the heart sound data indicates that S3 and S4 heart sounds are detected, wherein if an alarm state is not triggered, the physiological data associated with the subject is collected at the expiration of a preset period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for monitoring of cardiac conditions incorporating an implantable medical device in a subject, comprising:
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means for collecting physiological data associated with the subject from the implantable device, wherein the collected data includes real-time electrocardiac signal data, heart sound data, activity level data and tissue perfusion data; means for comparing the electrocardiac signal data with a threshold electrocardiac criteria for indicating a strong likelihood of a cardiac event, means for triggering an alarm state if the electrocardiac signal data is not within the threshold electrocardiac criteria; means for determining the current activity level of the subject from the activity level data if the electrocardiac signal data is within the threshold electrocardiac criteria; means for comparing the tissue perfusion data with a threshold tissue perfusion criteria for indicating a strong likelihood of a cardiac event if the current activity level is below a threshold activity level; means for triggering an alarm state if the threshold tissue perfusion data is not within the threshold tissue perfusion criteria; and means for triggering an alarm state if the threshold tissue perfusion data is within the threshold tissue perfusion criteria and the heart sound data indicates that S3 and S4 heart sounds are detected, wherein if an alarm state is not triggered, means for collecting the physiological data associated with the subject is at the expiration of a preset period of time.
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12. An implantable system for the monitoring of cardiac conditions in a subject, comprising
a support housing; -
a sensor disposed in the support housing and configured for collecting electrical data associated with cardiac performance; a sensor disposed in the support housing and configured for collecting mechanical data associated with cardiac performance; a sensor disposed in the support housing and configured for collecting optical data associated with cardiac performance; a sensor disposed in the support housing and configured for collecting biochemical data associated with cardiac performance; and a processor disposed in the support housing, the processor being in communication with the sensors and configured for collecting and processing sensor data to assess cardiac conditions and actuate an alarm upon identifying a cardiac event. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification