METHOD AND APPARATUS FOR DETECTING NON-SUSTAINING VENTRICULAR TACHYARRHYTHMIA
First Claim
1. An implantable medical device, comprising:
- a sensing circuit to sense a cardiac signal; and
a controller adapted to control a delivery of an anti-tachyarrhythmia therapy, the controller including;
a tachyarrhythmia detector coupled to the sensing circuit, the tachyarrhythmia detector adapted to detect a predetermined type initiation event indicative of a tachyarrhythmia episode from the cardiac signal, to start a tachyarrhythmia detection and classification process in response to the detection of the predetermined type initiation event, and to restart or extend the tachyarrhythmia detection and classification process in response to a detection of a predetermined type inhibitory event, the tachyarrhythmia detection and classification process determining whether the tachyarrhythmia episode sustains and is to be treated by the delivery of the anti-tachyarrhythmia therapy; and
an inhibitory event detector coupled to the tachyarrhythmia detector, the inhibitory event detector adapted to detect the predetermined type inhibitory event from the cardiac signal, the predetermined type inhibitory event indicative of a need to inhibit the delivery of the anti-tachyarrhythmia therapy.
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Abstract
An implantable medical device controls an anti-tachyarrhythmia therapy by detecting a tachyarrhythmia episode from a cardiac signal and analyzing the detected tachyarrhythmia episode in a tachyarrhythmia detection and analysis process to determine whether the anti-tachyarrhythmia therapy needs to be delivered. The tachyarrhythmia detection and classification process includes detection of inhibitory events each indicating that the tachyarrhythmia episode is of a type not to be treated by the anti-tachyarrhythmia therapy or that the tachyarrhythmia episode is not sustaining. The detection of each of the inhibitory events causes the tachyarrhythmia detection and classification process to be restarted or extended, or the delivery of the anti-tachyarrhythmia therapy to be withheld.
25 Citations
38 Claims
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1. An implantable medical device, comprising:
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a sensing circuit to sense a cardiac signal; and a controller adapted to control a delivery of an anti-tachyarrhythmia therapy, the controller including; a tachyarrhythmia detector coupled to the sensing circuit, the tachyarrhythmia detector adapted to detect a predetermined type initiation event indicative of a tachyarrhythmia episode from the cardiac signal, to start a tachyarrhythmia detection and classification process in response to the detection of the predetermined type initiation event, and to restart or extend the tachyarrhythmia detection and classification process in response to a detection of a predetermined type inhibitory event, the tachyarrhythmia detection and classification process determining whether the tachyarrhythmia episode sustains and is to be treated by the delivery of the anti-tachyarrhythmia therapy; and an inhibitory event detector coupled to the tachyarrhythmia detector, the inhibitory event detector adapted to detect the predetermined type inhibitory event from the cardiac signal, the predetermined type inhibitory event indicative of a need to inhibit the delivery of the anti-tachyarrhythmia therapy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for operating an implantable medical device, the method comprising:
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sensing a cardiac signal; detecting a predetermined type initiation event indicative of a tachyarrhythmia episode from the cardiac signal; starting a tachyarrhythmia detection and classification process when the predetermined type initiation event is detected; detecting a predetermined type inhibitory event from the cardiac signal, the predetermined type inhibitory event indicative of a need to inhibit a delivery of an anti-tachyarrhythmia therapy; and restarting or extending the tachyarrhythmia detection and classification process when the predetermined type inhibitory event is detected. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification