Systems and methods for detecting ischemic events
First Claim
1. In an implantable system, a method of detecting myocardial ischemic events, comprising:
- (a) monitoring short-term fluctuations in cardiac intervals that follow premature ventricular contractions;
(b) detecting myocardial ischemic events based on the monitored fluctuations; and
(c) performing one or more of the following in response to detecting myocardial ischemic events at step (b);
triggering myocardial ischemia therapy, transmitting an alert that an action appropriate to detection of myocardial ischemia should be taken, or storing a measure of myocardial ischemia burden.
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Abstract
Embodiments of the present invention relate to implantable systems, and method for use therein, that can detect myocardial ischemic events. In accordance with specific embodiments of the present invention, short-term fluctuations in cardiac intervals that follow premature ventricular contractions (PVCs) are monitored. This allows myocardial ischemic events to be detected based on these monitored fluctuations. The cardiac intervals for which fluctuations are being monitored can be, for example, RR intervals. Alternatively, or additionally, short-term fluctuations in other types of cardiac intervals may be monitored. Such other cardiac intervals include, for example, PR intervals, PP intervals, QT intervals and RT intervals.
26 Citations
26 Claims
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1. In an implantable system, a method of detecting myocardial ischemic events, comprising:
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(a) monitoring short-term fluctuations in cardiac intervals that follow premature ventricular contractions; (b) detecting myocardial ischemic events based on the monitored fluctuations; and (c) performing one or more of the following in response to detecting myocardial ischemic events at step (b);
triggering myocardial ischemia therapy, transmitting an alert that an action appropriate to detection of myocardial ischemia should be taken, or storing a measure of myocardial ischemia burden. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. In an implantable system, a method of detecting myocardial ischemic events, comprising:
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(a) monitoring short-term fluctuations in cardiac intervals that follow premature ventricular contractions; (b) detecting myocardial ischemic events based on the monitored fluctuations; and (c) storing timing and duration information related to each ischemic event and providing a measure of present ischemia burden. - View Dependent Claims (21)
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22. In an implantable system, a method of detecting myocardial ischemic events, comprising:
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(a) monitoring morphology of a signal that is indicative of cardiac intervals that follow premature ventricular contractions; and (b) detecting myocardial ischemic events based on the monitored morphology; and (c) triggering myocardial ischemia therapy in response to detecting a myocardial ischemic event. - View Dependent Claims (23, 24, 25, 26)
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Specification