Atrial and ventricular tachyarrhythmia detection system and method
First Claim
1. A method implemented with an implantable medical device, comprising:
- developing atrial and ventricular interval rates from sensed atrial and ventricular events, respectively;
classifying atrial interval rates in an atrial window, the atrial window having a first length and a first satisfaction criterion;
classifying ventricular interval rates in a ventricular window, the ventricular window having a second length and a second satisfaction criterion, the second length of the ventricular window differing from the first length of the atrial window to enhance detection of ventricular arrhythmias relative to atrial arrhythmia detection;
declaring a ventricular episode in response to satisfying the ventricular window by comparing classified ventricular interval rates to the second satisfaction criterion; and
declaring an atrial episode in response to satisfying the atrial window by comparing classified atrial interval rates to the first satisfaction criterion.
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Abstract
Detecting atrial and ventricular tachyarrhythmias involves classifying atrial interval rates in an atrial window having a first length and ventricular interval rates in a ventricular window having a second length. The second length of the ventricular window differs from the first length of the atrial window to enhance detection of ventricular arrhythmias relative to atrial arrhythmia detection. The atrial and ventricular interval rates in the respective windows are classified as fast or acceptable with respect to predefined thresholds. A ventricular episode is declared in response to satisfying the ventricular window according to a second satisfaction criterion. An atrial episode is declared in response to satisfying the atrial window according to a first satisfaction criterion.
39 Citations
48 Claims
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1. A method implemented with an implantable medical device, comprising:
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developing atrial and ventricular interval rates from sensed atrial and ventricular events, respectively;
classifying atrial interval rates in an atrial window, the atrial window having a first length and a first satisfaction criterion;
classifying ventricular interval rates in a ventricular window, the ventricular window having a second length and a second satisfaction criterion, the second length of the ventricular window differing from the first length of the atrial window to enhance detection of ventricular arrhythmias relative to atrial arrhythmia detection;
declaring a ventricular episode in response to satisfying the ventricular window by comparing classified ventricular interval rates to the second satisfaction criterion; and
declaring an atrial episode in response to satisfying the atrial window by comparing classified atrial interval rates to the first satisfaction criterion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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17. A method implemented with an implantable medical device, comprising:
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developing atrial and ventricular interval rates from sensed atrial and ventricular events, respectively;
providing an atrial window having a first length and a first satisfaction criterion;
providing a ventricular window having a second length and a second satisfaction criterion, the second length of the ventricular window differing from the first length of the atrial window to enhance detection of ventricular arrhythmias relative to atrial arrhythmia detection;
determining if the atrial and ventricular windows are satisfied according to the first and second satisfaction criteria, respectively;
determining, in response to satisfaction of the ventricular window, whether ventricular arrhythmia therapy is to be initiated; and
determining whether atrial arrhythmia therapy is to be initiated in response to satisfaction of the atrial window and non-initiation of ventricular arrhythmia therapy.
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33. A body implantable system, comprising:
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at least one lead comprising atrial and ventricular electrodes;
a detector, coupled to the at least one lead, that senses atrial events and ventricular events;
memory configured to define an atrial window, having a first length and a first satisfaction criterion, and a ventricular window, having a second length and a second satisfaction criterion, the second length of the ventricular window differing from the first length of the atrial window to enhance detection of ventricular arrhythmias relative to atrial arrhythmia detection; and
a control circuit coupled to the detector and memory, the control circuit classifying atrial and ventricular interval rates in the atrial and ventricular windows, respectively, declaring a ventricular episode in response to satisfying the ventricular window by comparing classified ventricular interval rates to the second satisfaction criterion, and declaring an atrial episode in response to satisfying the atrial window by comparing classified atrial interval rates to the first satisfaction criterion. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification