Method and apparatus for advanced tachyarrhythmia discrimination
First Claim
1. An active implantable medical device of the defibrillator/cardiovertor type, comprising:
- means for delivering a shock therapy;
means for monitoring atrial and ventricular activity;
means for suspecting and confirming the presence of a tachycardia episode in the monitored activity;
means of classification, operable to discriminate a suspected tachycardia episode as between a ventricular tachycardia and a supra-ventricular tachycardia according to a predetermined criteria and a given adjustment of said predetermined criteria, and to authorize delivery of a shock therapy in the presence of a ventricular tachycardia and to inhibit delivery of a shock therapy in the presence of a supra-ventricular tachycardia and said classification means further comprising means for modifying said discrimination operation, in response to a supra-ventricular tachycardia, by one of adding temporarily at least one criterion and modifying temporarily the adjustment of a predetermined criterion.
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Accused Products
Abstract
An active implantable medical device of the defibrillator/cardiovertor type with advanced tachycardia discrimination in which the device monitors the atrial and ventricular activity, suspects and confirms the presence of tachycardia episodes in the monitored activity, and operates a classification algorithm to discriminate between ventricular tachycardias and supra-ventricular tachycardias according to predetermined criteria and a given adjustment of these criteria, and to authorize the releasing of a shock therapy defibrillation, and/or cardioversion and/or anti-tachycardia ventricular stimulation in the presence ventricular tachycardias and to inhibit delivery of a shock therapy in the presence of a supra-ventricular tachycardias, or instead to release an atrial therapy. The advanced discrimination modifies the classification operation by being able to add temporarily one or more criterion and/or to modify temporarily the adjustment of an existing (predetermined) criterion in case of a suspected atrial fibrillation. Added criterion include particularly a supplementary research criterion of short and/or long RR intervals, which are significantly distanced from a zone of RR interval stability, which significantly distanced zones are, for example, separated from the RR interval stability zone by a predetermined width interval, which width interval is identical on both sides of the RR interval stability zone.
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Citations
20 Claims
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1. An active implantable medical device of the defibrillator/cardiovertor type, comprising:
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means for delivering a shock therapy; means for monitoring atrial and ventricular activity; means for suspecting and confirming the presence of a tachycardia episode in the monitored activity; means of classification, operable to discriminate a suspected tachycardia episode as between a ventricular tachycardia and a supra-ventricular tachycardia according to a predetermined criteria and a given adjustment of said predetermined criteria, and to authorize delivery of a shock therapy in the presence of a ventricular tachycardia and to inhibit delivery of a shock therapy in the presence of a supra-ventricular tachycardia and said classification means further comprising means for modifying said discrimination operation, in response to a supra-ventricular tachycardia, by one of adding temporarily at least one criterion and modifying temporarily the adjustment of a predetermined criterion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for discriminating tachycardia episodes in an active implantable medical device of the defibrillator/cardiovertor type for delivering a shock therapy, comprising:
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monitoring atrial and ventricular activity; identifying a tachycardia episode occurring in the monitored activity; classifying said tachycardia episode as between one of a ventricular tachycardia and a supra-ventricular tachycardia according to a predetermined criteria and a given adjustment of said predetermined criteria; authorizing delivery of a shock therapy in response to a classified ventricular tachycardia and inhibiting delivery of a shock therapy in response to a classified supra-ventricular tachycardia, and modifying said classifying step, in response to a discriminated atrial fibrillation, by one of adding temporarily at least one criterion and modifying temporarily the adjustment of a predetermined criterion to confirm said discriminated atrial fibrillation as one of genuine and not genuine. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification