Methods and systems for managing fusion and noise in cardiac pacing response classification
First Claim
1. A method for detecting cardiac signal noise during capture verification, comprising:
- delivering a pacing pulse to a heart chamber;
sensing a cardiac signal associated with the pacing pulse;
classifying a cardiac response to the pacing pulse based on the sensed cardiac signal;
sensing for unexpected signal content in the cardiac signal; and
determining that the cardiac response classification is possibly erroneous if the unexpected signal content is detected.
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Accused Products
Abstract
Methods and systems for detecting noise in cardiac pacing response classification processes involve determining that a cardiac response classification is possibly erroneous if unexpected signal content is detected. The unexpected signal content may comprise signal peaks that have polarity opposite to the polarity of peaks used to determine the cardiac response to pacing. Fusion/noise management processes include pacing at a relatively high energy level until capture is detected after a fusion, indeterminate or possibly erroneous pacing response classification is made. The relatively high energy pacing pulses may be delivered until capture is detected or until a predetermined number of paces are delivered.
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Citations
35 Claims
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1. A method for detecting cardiac signal noise during capture verification, comprising:
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delivering a pacing pulse to a heart chamber;
sensing a cardiac signal associated with the pacing pulse;
classifying a cardiac response to the pacing pulse based on the sensed cardiac signal;
sensing for unexpected signal content in the cardiac signal; and
determining that the cardiac response classification is possibly erroneous if the unexpected signal content is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for managing fusion, indeterminate or possibly erroneous pacing responses, comprising:
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delivering a first pacing pulse to a heart chamber;
delivering one or more pacing pulses to the heart chamber if a cardiac response associated with the first pacing pulse is at least one of fusion, indeterminate and possibly erroneous, the one or more pacing pulses having a pacing energy greater than the first pacing pulse;
determining one or more cardiac responses respectively associated with the one or more pacing pulses; and
continuing to deliver the one or more pacing pulses if each of the one or more cardiac responses is at least one of fusion, indeterminate and possibly erroneous. - View Dependent Claims (13, 14)
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15. A cardiac signal noise detection method, comprising:
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sensing a cardiac signal in one or more classification intervals following the delivery of a pacing pulse;
using the cardiac signal sensed in the one or more classification intervals to classify a cardiac response to the pacing pulse;
sensing the cardiac signal in a noise detection interval following the classification intervals; and
detecting noise based on the cardiac signal sensed in at least one of the one or more classification intervals and the noise detection interval. - View Dependent Claims (16)
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17. A cardiac rhythm management device, comprising:
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a pulse generator configured to deliver pacing pulses to a heart chamber;
a sensing circuit configured to sense cardiac signals of the heart chamber, the sensed cardiac signals respectively associated with the pacing pulses; and
a cardiac response classification processor, the processor coupled to the sensing circuit and configured to classify a cardiac response to a pacing pulse based on a sensed cardiac signal associated with the pacing pulse and to determine that the cardiac response classification is possibly erroneous if unexpected signal content is detected in the sensed cardiac signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A system for detecting cardiac signal noise during capture verification, comprising:
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a pulse generator for delivering a pacing pulse to a heart chamber;
a sensing circuit for sensing a cardiac signal associated with the pacing pulse;
means for classifying a cardiac response to the pacing pulse based on the sensed cardiac signal;
means for sensing for unexpected signal content in the cardiac signal; and
means for determining that the cardiac response classification is possibly erroneous if the unexpected signal content is detected. - View Dependent Claims (29, 30, 31, 32)
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33. A system for managing fusion, indeterminate or possibly erroneous pacing responses, comprising:
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means for determining that a cardiac response associated with a first pacing pulse is at least one of fusion, indeterminate and possibly erroneous;
means for delivering one or more pacing pulses if the cardiac response associated with the first pacing pulse is at least one of fusion, indeterminate and possibly erroneous;
means for determining a cardiac response associated with each of the one or more pacing pulses; and
means for continuing to deliver the one or more pacing pulses if the cardiac response associated with each of the one or more pacing pulses is at least one of fusion, indeterminate and possibly erroneous. - View Dependent Claims (34, 35)
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Specification