Method and system for automatic anti-tachycardia pacing
First Claim
1. A method for delivery of anti-tachycardia pacing (ATP) therapy by a cardiac rhythm management device, comprising:
- generating sense signals representing electrical activity in a heart chamber and detecting a chamber sense when a sense signal exceeds a specified intrinsic detection threshold;
detecting a tachycardia in the heart chamber when a rate at which chamber senses are detected exceeds a specified tachycardia threshold value;
upon detection of a tachycardia, delivering a burst of one or more pacing pulses in accordance with an anti-tachycardia pacing protocol, where the burst is output after a specified coupling interval with respect to a chamber sense; and
, determining if a pacing pulse has captured the heart chamber by detecting whether an evoked response occurs during a capture detection window following the output of a pacing pulse and storing an indication of whether capture has been achieved in a memory of the device.
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Abstract
A method and system for delivering anti-tachycardia pacing is disclosed. A cardiac rhythm management device, such as an implantable pacemaker having anti-tachycardia pacing capability, delivers anti-tachycardia pacing therapy in accordance with an anti-tachycardia pacing protocol upon detection of a terminable arrhythmia. The anti-tachycardia pacing is delivered as a burst of one or more pacing pulses at a specified coupling interval after a sensed ventricular polarization. By sensing if an evoked potential occurs, the device can determine whether or not the anti-tachycardia pacing burst has captured the ventricle and can adjust the coupling interval and/or other parameters accordingly.
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Citations
24 Claims
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1. A method for delivery of anti-tachycardia pacing (ATP) therapy by a cardiac rhythm management device, comprising:
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generating sense signals representing electrical activity in a heart chamber and detecting a chamber sense when a sense signal exceeds a specified intrinsic detection threshold;
detecting a tachycardia in the heart chamber when a rate at which chamber senses are detected exceeds a specified tachycardia threshold value;
upon detection of a tachycardia, delivering a burst of one or more pacing pulses in accordance with an anti-tachycardia pacing protocol, where the burst is output after a specified coupling interval with respect to a chamber sense; and
,determining if a pacing pulse has captured the heart chamber by detecting whether an evoked response occurs during a capture detection window following the output of a pacing pulse and storing an indication of whether capture has been achieved in a memory of the device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A cardiac rhythm management device, comprising:
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a sensing channel for generating sense signals representing electrical activity in a heart chamber;
a pacing channel for delivering paces to a selected heart chamber;
a controller for controlling the delivery of pacing pulses in accordance with a programmed mode, detecting a chamber sense when the sense signal exceeds a specified intrinsic detection threshold, and detecting an evoked response when the sense signal following a pace exceeds a specified evoked response detection threshold; and
,wherein the controller is further programmed to;
detect a tachycardia in the heart chamber when a rate at which chamber senses are detected exceeds a specified tachycardia threshold value and deliver a burst of one or more pacing pulses to the heart chamber in accordance with an anti-tachycardia pacing protocol upon detection of a tachycardia, where the burst is output after a specified coupling interval with respect to a chamber sense; and
,determine whether a pacing pulse has captured the heart chamber in accordance with whether an evoked response is detected during a capture detection window following the output of a pacing pulse. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification