INDUCING PREMATURE ATRIAL CONTRACTIONS FOR THE PURPOSE OF MONITORING AUTONOMIC TONE RISK OF SUDDEN CARDIAC DEATH AND ISCHEMIC EVENTS
First Claim
1. For use with an implantable system, a method of performing at least one of a cardiac assessment and an autonomic assessment, comprising:
- (a) inducing premature atrial contractions (PACs) to thereby cause a corresponding premature contractions in the ventricles;
(b) monitoring morphology of a signal that is indicative of cardiac intervals that follow the premature contractions of the ventricles caused by the induced PACs; and
(c) performing at least one of a cardiac assessment and an autonomic assessment, based on the monitored morphology of the signal that is indicative of cardiac intervals that follow the premature contractions of the ventricles caused by the induced PACs.
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Abstract
Implantable systems, and methods for use therein, perform at least one of a cardiac assessment and an autonomic assessment. Premature atrial contractions (PACs) are induced to thereby cause corresponding premature contractions in the ventricles. Short-term fluctuations in cardiac intervals, that follow the premature contractions in the ventricles caused by the induced PACs, are monitored. At least one of a cardiac assessment and an autonomic assessment is performed based on the monitored fluctuations in cardiac intervals that follow the premature contractions in the ventricles caused by the induced PACs. This can include assessing a patient'"'"'s risk of sudden cardiac death (SCD), assessing a patient'"'"'s autonomic tone and/or detecting myocardial ischemic events based on the monitored fluctuations in cardiac intervals that follow the premature contractions in the ventricles caused by the induced PACs.
61 Citations
11 Claims
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1. For use with an implantable system, a method of performing at least one of a cardiac assessment and an autonomic assessment, comprising:
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(a) inducing premature atrial contractions (PACs) to thereby cause a corresponding premature contractions in the ventricles; (b) monitoring morphology of a signal that is indicative of cardiac intervals that follow the premature contractions of the ventricles caused by the induced PACs; and (c) performing at least one of a cardiac assessment and an autonomic assessment, based on the monitored morphology of the signal that is indicative of cardiac intervals that follow the premature contractions of the ventricles caused by the induced PACs. - View Dependent Claims (2, 3, 4, 5)
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6. An implantable system for performing at least one of a cardiac assessment and an autonomic assessment, comprising:
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means for inducing premature atrial contractions (PACs) to thereby cause corresponding premature contractions in the ventricles; means for monitoring morphology of a signal that is indicative of cardiac intervals that follow the premature contractions of the ventricles caused by the induced PACs; and means for performing at least one of a cardiac assessment and an autonomic assessment, based on the monitored morphology of the signal that is indicative of cardiac intervals that follow the premature contractions of the ventricles caused by the induced PACs. - View Dependent Claims (7, 8, 9, 10)
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11. For use with an implantable system, a method of performing at least one of a cardiac assessment and an autonomic assessment, comprising:
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(a) inducing a premature atrial contraction (PAC) that is followed, after an AV delay, by delivery of a ventricular pacing pulse; (b) monitoring short-term fluctuations in cardiac intervals that follow the delivery of the ventricular pacing pulse that followed the induced PAC; and (c) performing at least one of a cardiac assessment and an autonomic assessment, based on the monitored fluctuations in cardiac intervals that follow the delivery of the ventricular pacing pulse that followed the induced PAC.
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Specification