ATP pacing with entrainment monitoring
First Claim
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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;
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
, determining the extent to which the heart chamber has been entrained by counting the number of successive pacing pulses achieving capture during the burst.
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Abstract
A method and system for delivering anti-tachycardia pacing (ATP) is disclosed. During delivery of an ATP burst, an implantable cardiac rhythm management device is programmed to sense evoked responses and determine whether or not the ATP burst has entrained the heart by counting the number of successive pacing pulses achieving capture. This information may then be used by the device to adjust the manner in which the ATP therapy is delivered.
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Citations
20 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;
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
,determining the extent to which the heart chamber has been entrained by counting the number of successive pacing pulses achieving capture during the burst. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 16)
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11. A method for delivery of anti-tachycardia pacing (ATP) therapy by a cardiac rhythm management device, comprising:
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a sensing channel for 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;
a pacing channel for delivering anti-tachycardia pacing therapy;
a controller interfaced to the sensing and pacing channel, wherein the controller is programmed to;
detect 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, deliver 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;
determine 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
,determine the extent to which the heart chamber has been entrained by counting the number of successive pacing pulses achieving capture during the burst. - View Dependent Claims (12, 13, 14, 15, 17, 18, 19, 20)
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Specification