Confirming sensed atrial events for pacing during resynchronization therapy in a cardiac medical device and medical device system
First Claim
1. A medical device system for controlling delivery of therapeutic stimulation pulses, the medical device system comprising:
- a sensing device configured to;
sense a cardiac signal of a patient; and
emit a trigger signal in response to the sensed cardiac signal;
a therapy delivery device configured to;
receive the trigger signal; and
deliver therapy to the patient in response to the emitted trigger signal; and
a processor positioned within the sensing device, the processor being configured to;
determine whether the sensed cardiac signal exceeds a P-wave candidate threshold;
compare, in response to a determination that the sensed cardiac signal exceeds the P-wave candidate threshold, a portion of the sensed cardiac signal to a P-wave template, the P-wave template comprising a sensing window having a length less than a width of a P-wave with a predetermined P-wave morphology, the sensing window corresponding to a time window that ends prior to an end of the P-wave with the predetermined P-wave morphology;
confirm an occurrence of a P-wave in the sensed cardiac signal in response to the comparison between the portion of the sensed cardiac signal and the P-wave template;
generate, in response to the occurrence of the P-wave in the sensed cardiac signal being confirmed, the trigger signal emitted by the sensing device; and
inhibit delivery of the trigger signal in response to the occurrence of the P-wave in the sensed cardiac signal not being confirmed.
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0 Petitions
Accused Products
Abstract
A medical device and medical device system for controlling delivery of therapeutic stimulation pulses that includes a sensing device to sense a cardiac signal and emit a trigger signal in response to the sensed cardiac signal, a therapy delivery device to receive the trigger signal and deliver therapy to the patient in response to the emitted trigger signal, and a processor positioned within the sensing device, the processor configured to determine whether the sensed cardiac signal exceeds a possible P-wave threshold, compare a portion of the sensed cardiac signal to a P-wave template having a sensing window having a length less than a width of the P-wave, confirm an occurrence of a P-wave signal in response to the comparing, emit the trigger signal in response to the occurrence of a P-wave signal being confirmed, and inhibit delivery of the emitting signal in response to the occurrence of a P-wave signal not being confirmed.
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Citations
37 Claims
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1. A medical device system for controlling delivery of therapeutic stimulation pulses, the medical device system comprising:
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a sensing device configured to; sense a cardiac signal of a patient; and emit a trigger signal in response to the sensed cardiac signal; a therapy delivery device configured to; receive the trigger signal; and deliver therapy to the patient in response to the emitted trigger signal; and a processor positioned within the sensing device, the processor being configured to; determine whether the sensed cardiac signal exceeds a P-wave candidate threshold; compare, in response to a determination that the sensed cardiac signal exceeds the P-wave candidate threshold, a portion of the sensed cardiac signal to a P-wave template, the P-wave template comprising a sensing window having a length less than a width of a P-wave with a predetermined P-wave morphology, the sensing window corresponding to a time window that ends prior to an end of the P-wave with the predetermined P-wave morphology; confirm an occurrence of a P-wave in the sensed cardiac signal in response to the comparison between the portion of the sensed cardiac signal and the P-wave template; generate, in response to the occurrence of the P-wave in the sensed cardiac signal being confirmed, the trigger signal emitted by the sensing device; and inhibit delivery of the trigger signal in response to the occurrence of the P-wave in the sensed cardiac signal not being confirmed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A medical device system for controlling delivery of therapeutic stimulation pulses, the medical device system comprising:
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a sensing device configured to; sense a cardiac signal of a patient; and emit a trigger signal in response to the sensed cardiac signal; a therapy delivery device configured to; receive the trigger signal; and deliver therapy to the patient in response to the emitted trigger signal; and a processor positioned within the sensing device, the processor being configured to; determine whether the cardiac signal comprises a T-wave; determine, in response to a determination that the cardiac signal comprises a T-wave, whether the sensed cardiac signal exceeds a P-wave candidate threshold; compare, in response to a determination that the sensed cardiac signal exceeds the P-wave candidate threshold, a portion of the sensed cardiac signal to a P-wave template, the P-wave template comprising a sensing window having a length less than a width of a P-wave with a predetermined P-wave morphology, the sensing window corresponding to a time window that ends prior to an end of the P-wave with the predetermined P-wave morphology; confirm an occurrence of a P-wave in the sensed cardiac signal in response to the comparison between the portion of the sensed cardiac signal and the P-wave template; generate, in response to the occurrence of a P-wave in the sensed cardiac signal being confirmed, the trigger signal emitted by the sensing device; and inhibit delivery of the trigger signal in response to one of the T-wave not occurring and the occurrence of the P-wave in the sensed cardiac signal not being confirmed. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of delivering therapeutic stimulation pulses, the method comprising:
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sensing a cardiac signal of a patient; receiving a trigger signal; delivering therapy to the patient via a therapy delivery device in response to the emitted trigger signal; determining whether the sensed cardiac signal exceeds a P-wave candidate threshold; comparing, in response to determining that the sensed cardiac signal exceeds the P-wave candidate threshold, a portion of the sensed cardiac signal to a P-wave template, the P-wave template comprising a sensing window having a length less than a width of a P-wave with a predetermined P-wave morphology, the sensing window corresponding to a time window that ends prior to an end of the P-wave with the predetermined P-wave morphology; confirming an occurrence of a P-wave in the sensed cardiac signal in response to the comparison between the portion of the sensed cardiac signal and the P-wave template; generating the trigger signal in response to the occurrence of the P-wave in the sensed cardiac signal being confirmed; and inhibiting delivery of the trigger signal in response to the occurrence of the P-wave in the sensed cardiac signal not being confirmed. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A method of delivering therapeutic stimulation pulses, the method comprising:
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sensing a cardiac signal of a patient; receiving a trigger signal; delivering therapy to the patient via a therapy delivery device in response to the emitted trigger signal; determining whether the cardiac signal comprises a T-wave; determining, in response to a T-wave occurring, whether the sensed cardiac signal exceeds a P-wave candidate threshold; comparing, in response to determining that the sensed cardiac signal exceeds the P-wave candidate threshold, a portion of the sensed cardiac signal to a P-wave template, the P-wave template comprising a sensing window having a length less than a width of a P-wave with a predetermined P-wave morphology, the sensing window corresponding to a time window that ends prior to an end of the P-wave with the predetermined P-wave morphology; confirming an occurrence of a P-wave in the sensed cardiac signal in response to the comparison between the portion of the sensed cardiac signal and the P-wave template; generating the trigger signal in response to the occurrence of the P-wave in the sensed cardiac signal being confirmed; and inhibiting delivery of the trigger signal in response to one of the T-wave not occurring and the occurrence of the P-wave in the sensed cardiac signal not being confirmed. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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33. A medical device for controlling delivery of therapeutic stimulation pulses, the medical device comprising:
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a subcutaneous sensing device comprising subcutaneously implanted electrodes configured to sense a cardiac signal of a patient; an emitting device configured to emit a trigger signal to deliver the therapeutic stimulation pulses in response to the sensed cardiac signal; and a processor positioned within the subcutaneous sensing device, the processor configured to; determine whether the sensed cardiac signal exceeds a P-wave candidate threshold, compare, in response to a determination that the sensed cardiac signal exceeds the P-wave candidate threshold, a portion of the sensed cardiac signal to a P-wave template, the P-wave template comprising a sensing window having a length less than a width of a P-wave with a predetermined P-wave morphology, the sensing window corresponding to a time window that ends prior to an end of the P-wave with the predetermined P-wave morphology; confirm an occurrence of a P-wave in the sensed cardiac signal in response to the comparison between the portion of the sensed cardiac signal and the P-wave template; generate, in response to the occurrence of the P-wave in the sensed cardiac signal being confirmed, the trigger signal emitted by the emitting device; and inhibit delivery of the trigger signal in response to the occurrence of the P-wave in the sensed cardiac signal not being confirmed. - View Dependent Claims (34, 35, 36, 37)
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Specification