Zoneless tachyarrhythmia detection with real-time rhythm monitoring
First Claim
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1. A method of using an implantable medical device (IMD) comprising:
- monitoring a ventricular contraction rate of a subject;
monitoring an atrial contraction rate of the subject;
declaring tachyarrhythmia if the ventricular contraction rate exceeds the atrial contraction rate; and
declaring a slow tachyarrhythmia when the ventricular contraction rate exceeds the atrial contraction rate and the ventricular rate is less than a specified lowest tachyarrhythmia detection rate.
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Abstract
A method of using an implantable medical device (IMD) to monitor a ventricular contraction rate of a subject, monitor an atrial contraction rate of the subject, declare tachyarrhythmia if the ventricular contraction rate exceeds the atrial contraction rate, and declare a slow tachyarrhythmia when the ventricular rate exceeds the atrial rate and the ventricular rate is less than a specified maximum pacing rate.
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Citations
21 Claims
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1. A method of using an implantable medical device (IMD) comprising:
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monitoring a ventricular contraction rate of a subject; monitoring an atrial contraction rate of the subject; declaring tachyarrhythmia if the ventricular contraction rate exceeds the atrial contraction rate; and declaring a slow tachyarrhythmia when the ventricular contraction rate exceeds the atrial contraction rate and the ventricular rate is less than a specified lowest tachyarrhythmia detection rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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a ventricular contraction sensing circuit configured to provide a sensed ventricular contraction signal of a heart of a subject; an atrial contraction sensing circuit configured to provide a sensed atrial contraction signal; a timer circuit operable to provide a ventricular time interval between ventricular contractions and an atrial time interval between atrial contractions; and a controller circuit coupled to the timer circuit, the controller circuit configured to; monitor a ventricular contraction rate or the ventricular time interval; and monitor an atrial contraction rate or the atrial time interval, and wherein the controller circuit further includes a tachyarrhythmia detection module configured to; declare tachyarrhythmia when the ventricular contraction rate exceeds the atrial contraction rate or the ventricular time interval is less than the atrial time interval; and declare a slow tachyarrhythmia when the ventricular contraction rate exceeds the atrial contraction rate and either of the following;
when the ventricular rate is less than a specified maximum pacing rate, or when the ventricular time interval is more than a specified minimum specified pacing interval. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification