Cardiac rhythm management system with time-dependent frequency response
First Claim
1. A cardiac rhythm management system, including a sensing circuit for sensing a heart signal, the sensing circuit having a frequency response that is time-dependent during a first time period initiated by one of an evoked or an intrinsic event of the heart signal.
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Accused Products
Abstract
A cardiac rhythm management system includes a time-dependent frequency response for sensed heart signals. A change in the frequency response of a sensing circuit is triggered by a sensed or evoked event to make it less sensitive to the detection of a subsequent event for a period of time. For example, a passband bandwidth is reduced, then increased during the time period triggered by the event. For even more event-triggered selectivity, a gain is reduced, then increased during the time period triggered by the event. This provides better discrimination between particular events included in a heart signal so that appropriate therapy can be delivered to the patient based such events.
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Citations
36 Claims
- 1. A cardiac rhythm management system, including a sensing circuit for sensing a heart signal, the sensing circuit having a frequency response that is time-dependent during a first time period initiated by one of an evoked or an intrinsic event of the heart signal.
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22. A cardiac rhythm management system, including:
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an electronics unit including;
a therapy circuit;
a sensing circuit for sensing a heart signal of a heart; and
a bandpass filter, included in the sensing circuit, the filter having a frequency response that is time-dependent during a first time period initiated by one of an evoked or an intrinsic event of the heart signal; and
a leadwire, coupled to the electronics unit; and
a programmer, remote from and communicatively coupled to the electronics unit, the programmer including a parameter controlling one of;
(a) the frequency response of the bandpass filter, and (b) the duration of the first time period. - View Dependent Claims (23)
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24. A method including:
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receiving, from a heart, a heart signal that includes an intrinsic event;
filtering the heart signal to attenuate frequencies outside a frequency range having a first frequency range value;
detecting the event; and
adjusting the frequency range from the first frequency range value to a second frequency range value in response to the detection of the event. - View Dependent Claims (25, 26, 27, 28)
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29. A method including:
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receiving, from a heart, a heart signal that includes an intrinsic event;
providing, to the heart, a stimulation for obtaining an evoked event;
filtering the heart signal to attenuate frequencies outside a frequency range having a first frequency range value;
detecting the intrinsic event;
narrowing the frequency range from the first frequency range value to a second frequency range value in response to (a) the detection of the intrinsic event, and (b) the providing the stimulation; and
widening the frequency range from the second frequency range value such that the frequency range approaches the first frequency range value after a first time period from (a) the detection of the intrinsic event and (b) the providing the stimulation. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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Specification