Rhythm discrimination enhancement—AV drive
First Claim
1. A system comprising:
- an implantable device including;
an implantable cardiac signal sensing circuit, configured to provide a sensed depolarization signal from a ventricle and a sensed depolarization signal from an atrium; and
a controller circuit communicatively coupled to the implantable cardiac signal sensing circuit, wherein the controller circuit includes;
a one-to-one detector circuit configured to;
measure cardiac depolarization intervals of the atrium and the ventricle; and
determine whether a relationship of atrial (A-A) depolarizations to ventricular (V-V) depolarizations is substantially one-to-one;
a tachyarrhythmia discrimination circuit configured to;
detect an episode of tachyarrhythmia when the relationship atrial depolarizations to ventricular depolarizations is substantially one-to-one;
generate an indication of VT when detecting one of a shortening or prolonging of an A-A interval during the episode that is immediately preceded by the same one of a shortening or prolonging of a V-V interval during the episode;
generate an indication of a supra-ventricular tachycardia (SVT) event when detecting one of a shortening or prolonging of an A-A interval that immediately precedes the same one of a shortening or prolonging of the V-V interval during the episode; and
classify the tachyarrhythmia episode as one of VT or SVT according to the generated indications of VT and SVT.
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Accused Products
Abstract
An apparatus comprises an implantable cardiac signal sensing circuit and a controller circuit. The implantable cardiac signal sensing circuit provides a sensed depolarization signal from a ventricle and a sensed depolarization signal from an atrium. The controller circuit includes a one-to-one detector circuit and a tachyarrhythmia discrimination circuit. The one-to-one detector circuit measures cardiac depolarization intervals of the atrium and the ventricle and determines whether a relationship of atrial depolarizations to ventricular depolarizations is substantially one-to-one. The tachyarrhythmia discrimination circuit classifies the episode as VT when detecting a shortening or prolonging of a V-V interval that immediately precedes the same shortening or prolonging of an A-A interval.
47 Citations
20 Claims
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1. A system comprising:
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an implantable device including; an implantable cardiac signal sensing circuit, configured to provide a sensed depolarization signal from a ventricle and a sensed depolarization signal from an atrium; and a controller circuit communicatively coupled to the implantable cardiac signal sensing circuit, wherein the controller circuit includes; a one-to-one detector circuit configured to; measure cardiac depolarization intervals of the atrium and the ventricle; and determine whether a relationship of atrial (A-A) depolarizations to ventricular (V-V) depolarizations is substantially one-to-one; a tachyarrhythmia discrimination circuit configured to; detect an episode of tachyarrhythmia when the relationship atrial depolarizations to ventricular depolarizations is substantially one-to-one; generate an indication of VT when detecting one of a shortening or prolonging of an A-A interval during the episode that is immediately preceded by the same one of a shortening or prolonging of a V-V interval during the episode; generate an indication of a supra-ventricular tachycardia (SVT) event when detecting one of a shortening or prolonging of an A-A interval that immediately precedes the same one of a shortening or prolonging of the V-V interval during the episode; and classify the tachyarrhythmia episode as one of VT or SVT according to the generated indications of VT and SVT. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method comprising:
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monitoring cardiac depolarization intervals in an atrium and in a ventricle of a heart of a subject using an implantable medical device (IMD); detecting an episode of tachyarrhythmia using cardiac depolarization intervals; determining that a relationship of A-A depolarizations to V-V depolarizations is substantially one-to-one during the episode; generating an indication of a VT event when detecting one of a shortening or prolonging of a V-V interval that immediately precedes the same one of a shortening or prolonging of the A-A interval during the episode; generating an indication of a SVT event when detecting one of a shortening or prolonging of an A-A interval that immediately precedes the same one of a shortening or prolonging of the V-V interval during the episode; and classifying, by the IMD, the tachyarrhythmia episode as one of VT or SVT according to the generated indications of VT and SVT, and providing the classification of the tachyarrhythmia episode to a user or process. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification