Dynamic adjustment of capture management "safety margin"
First Claim
1. A method of providing capture management in an implantable medical device, the method comprising:
- monitoring for indicators of a likely increase in pacing threshold; and
increasing a safety factor used in setting a pacing pulse output energy if an indicator of increased pacing threshold is detected.
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Accused Products
Abstract
A cardiac stimulation system and associated capture management method are provided in which a safety factor, used in setting pacing pulse output energy, is automatically adjusted in response to the detection of indicators of a likely increase in pacing threshold. The method includes monitoring for increased pacing threshold indicators, which may also be associated with a compromised ability to perform a pacing threshold search. Such indicators may include, but are not limited to, the presence of arrhythmias, arrhythmia episode duration, pacing mode switches, refractory sensed events, and/or lead impedance changes. In response to the detection of a selected indicator of increased pacing threshold, the safety factor is automatically increased. After an increased pacing threshold indicator has not be detected for an interval of time, or if a pacing threshold search yields a result, the safety factor may be restored to a programmed value.
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Citations
20 Claims
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1. A method of providing capture management in an implantable medical device, the method comprising:
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monitoring for indicators of a likely increase in pacing threshold; and
increasing a safety factor used in setting a pacing pulse output energy if an indicator of increased pacing threshold is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable medical device, comprising:
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a pulse generator for delivering pacing pulses;
at least one electrode in electrical communication with the pulse generator for delivering the pacing pulses to cardiac tissue; and
a microprocessor for controlling the pulse generator, receiving sensed data from the at least one electrode, wherein the sensed data includes an indicator of increased pacing threshold, and increasing a safety factor used for setting the pacing pulse energy delivered by the pulse generator when the indicator of increased pacing threshold is detected.
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12. An implantable medical device (IMD) comprising:
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means for monitoring for indicators of a likely increase in pacing threshold; and
means for increasing a safety factor used in setting a pacing pulse output energy if an indicator of increased pacing threshold is detected. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification