SYSTEMS AND METHODS FOR ASSESSING AND REPROGRAMMING SENSING VECTORS FOR USE WITH AN IMPLANTABLE CARDIAC RHYTHM MANAGEMENT DEVICE
First Claim
1. A method for use with an implantable medical device capable of sensing electrical signals along a plurality of sensing channels connected to a selectable sensing vector, the method comprising:
- sensing electrical signals within the patient using a primary sensing vector connected to a primary sensing channel for use in controlling the delivery of therapy;
sensing additional electrical signals within the patient using an alternate sensing vector connected to an alternate sensing channel; and
while continuing to sense signals using the primary sensing vector, assessing whether the alternate sensing vector provides improved sensing over the primary sensing vector and, if so, switching the primary sensing channel from the primary sensing vector to the alternate sensing vector for sensing further electrical signals for use in controlling further therapy.
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Abstract
Techniques are provided for use with a pacemaker or other implantable medical device capable of sensing electrical signals along a set of programmable sensing vectors. In one example, electrical cardiac signals are sensed within a patient using a primary sensing vector connected to a primary sensing channel for use in controlling the delivery of therapy. If the device detects a significant drop in key signal parameters such as peak signal amplitude or slew rate, an assessment is made whether an alternate sensing vector provides improved cardiac signal sensing. During the assessment, the device can continue to sense signals along the primary channel for the purposes of controlling therapy while alternate vectors are assessed in the background. If it is determined that an alternate sensing vector provides improved cardiac signal sensing, the primary sensing channel can be switched to the alternate sensing vector for use in controlling further therapy.
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Citations
20 Claims
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1. A method for use with an implantable medical device capable of sensing electrical signals along a plurality of sensing channels connected to a selectable sensing vector, the method comprising:
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sensing electrical signals within the patient using a primary sensing vector connected to a primary sensing channel for use in controlling the delivery of therapy; sensing additional electrical signals within the patient using an alternate sensing vector connected to an alternate sensing channel; and while continuing to sense signals using the primary sensing vector, assessing whether the alternate sensing vector provides improved sensing over the primary sensing vector and, if so, switching the primary sensing channel from the primary sensing vector to the alternate sensing vector for sensing further electrical signals for use in controlling further therapy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for use with an implantable medical device capable of sensing electrical signals along a plurality of sensing channels connected to a selectable sensing vector, the system comprising:
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a primary signal sensing system operative to sense electrical signals within the patient using a primary sensing vector connected to a primary sensing channel for use in controlling the delivery of therapy; an alternate signal sensing system operative to sense electrical signals within the patient using an alternate sensing vector connected to an alternate sensing channel; an sensing configuration assessment system operative, while the primary signal sensing system continues to sense electrical signals, to assess whether the alternate sensing vector provides improved signal sensing over the primary sensing vector; and a sensing configuration switching system operative to selectively switch the primary sensing channel from the primary sensing vector to the alternate sensing vector for sensing further signals for use in controlling further therapy. - View Dependent Claims (18)
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19. A system for use with an implantable medical device capable of sensing electrical signals along a plurality of sensing channels connected to a selectable sensing vector, the system comprising:
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means for sensing electrical signals within the patient using a primary sensing vector connected to a primary sensing channel for use in controlling the delivery of therapy; means for sensing additional electrical signals within the patient using an alternate sensing vector connected to an alternate sensing channel; and means, operative while the means for sensing electrical signals continues to sense signals using the primary sensing vector, for assessing whether the alternate sensing vector provides improved sensing over the primary sensing vector and, in response, for switching the primary sensing channel from the primary sensing vector to the alternate sensing vector for sensing further electrical signals for use in controlling further therapy.
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20. A method for use with an implantable medical device capable of sensing electrical signals along a plurality of sensing channels connected to a selectable set of sensing vectors, the method comprising:
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sensing electrical signals within the patient using a primary sensing vector connected to a primary sensing channel for use in controlling the delivery of therapy; detecting a significant change in a slew rate of the electrical signals sensed along the primary sensing vector; and assessing whether an alternate sensing vector provides improved signal sensing over the primary sensing vector and, if so, selectively switching the primary sensing channel from the primary sensing vector to the alternate sensing vector for sensing further electrical signals for use in controlling further therapy.
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Specification