Automated phrenic nerve stimulation and pacing capture threshold test
First Claim
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1. An automated method for determining pacing threshold data, comprising:
- receiving a signal from a cardiac capture sensor;
receiving a signal from a phrenic nerve stimulation sensor;
determining a cardiac capture threshold from the cardiac capture sensor signal while detecting phrenic nerve stimulation from the phrenic nerve stimulation sensor signal for each of a plurality of pacing electrode vectors, the determining comprising;
delivering a stimulation pulse via a selected one of the plurality of pacing electrode vectors using a first pacing pulse output;
detecting from the phrenic nerve stimulation sensor signal whether phrenic nerve stimulation occurs in response to the first pacing pulse output;
adjusting the stimulation pulse by a first step to a second pacing pulse output in response to detecting the phrenic nerve stimulation;
detecting from the cardiac capture sensor signal whether cardiac capture occurs in response to the second pacing pulse output; and
adjusting the stimulation pulse output by a second step to a third pacing pulse output in response to detecting cardiac capture, the second step being less than the first step.
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Abstract
A medical device system performs a method for determining pacing threshold data. Signals are received from a cardiac capture sensor and a phrenic nerve stimulation sensor. A cardiac capture threshold is determined from the cardiac capture sensor signal and a phrenic nerve stimulation threshold is determined from the phrenic nerve stimulation sensor signal for multiple pacing electrode vectors.
71 Citations
22 Claims
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1. An automated method for determining pacing threshold data, comprising:
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receiving a signal from a cardiac capture sensor; receiving a signal from a phrenic nerve stimulation sensor; determining a cardiac capture threshold from the cardiac capture sensor signal while detecting phrenic nerve stimulation from the phrenic nerve stimulation sensor signal for each of a plurality of pacing electrode vectors, the determining comprising; delivering a stimulation pulse via a selected one of the plurality of pacing electrode vectors using a first pacing pulse output; detecting from the phrenic nerve stimulation sensor signal whether phrenic nerve stimulation occurs in response to the first pacing pulse output; adjusting the stimulation pulse by a first step to a second pacing pulse output in response to detecting the phrenic nerve stimulation; detecting from the cardiac capture sensor signal whether cardiac capture occurs in response to the second pacing pulse output; and adjusting the stimulation pulse output by a second step to a third pacing pulse output in response to detecting cardiac capture, the second step being less than the first step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A medical device system for determining pacing threshold data, comprising:
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a cardiac capture sensor; a phrenic nerve stimulation sensor; a pulse generator selectively coupled to a plurality of electrode vectors; a processor coupled to the cardiac capture sensor, the phrenic nerve stimulation sensor and the pulse generator and configured to determine a cardiac capture threshold from the cardiac capture sensor signal while detecting phrenic nerve stimulation from the phrenic nerve stimulation sensor signal for each of the plurality of pacing electrode vectors, the determining comprising; controlling the pulse generator to deliver a stimulation pulse via a selected one of the plurality of pacing electrode vectors using a first pacing pulse output; detecting from the phrenic nerve stimulation sensor signal whether phrenic nerve stimulation occurs in response to the first pacing pulse output; adjusting the stimulation pulse by a first step to a second pacing pulse output in response to detecting the phrenic nerve stimulation; detecting from the cardiac capture sensor signal whether cardiac capture occurs in response to the second pacing pulse output; and adjusting the stimulation pulse output by a second step to a third pacing pulse output in response to detecting cardiac capture, the second step being less than the first step. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A non-transitory, computer-readable storage medium storing instructions for causing a processor included in a medical device system to perform a method for determining pacing threshold data, the method comprising:
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receiving a signal from a cardiac capture sensor; receiving a signal from a phrenic nerve stimulation sensor; determining a cardiac capture threshold from the cardiac capture sensor signal while detecting phrenic nerve stimulation from the phrenic nerve stimulation sensor signal for each of a plurality of pacing electrode vectors, the determining comprising; delivering a stimulation pulse via a selected one of the plurality of pacing electrode vectors using a first pacing pulse output; detecting from the phrenic nerve stimulation sensor signal whether phrenic nerve stimulation occurs in response to the first pacing pulse output; adjusting the stimulation pulse by a first step to a second pacing pulse output in response to detecting the phrenic nerve stimulation; detecting from the cardiac capture sensor signal whether cardiac capture occurs in response to the second pacing pulse output; and adjusting the stimulation pulse output by a second step to a third pacing pulse output in response to detecting cardiac capture, the second step being less than the first step.
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22. A system, comprising:
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receiving means for receiving a signal from a cardiac capture sensor; receiving means for receiving a signal from a phrenic nerve stimulation sensor; output means for delivering stimulation pulses; and processing means for determining a cardiac capture threshold from the cardiac capture sensor signal while detecting phrenic nerve stimulation from the phrenic nerve stimulation sensor signal for each of a plurality of pacing electrode vectors, the determining comprising; delivering a stimulation pulse by the output means via a selected one of the plurality of pacing electrode vectors using a first pacing pulse output; detecting from the phrenic nerve stimulation sensor signal whether phrenic nerve stimulation occurs in response to the first pacing pulse output; adjusting the stimulation pulse by a first step to a second pacing pulse output in response to detecting the phrenic nerve stimulation; detecting from the cardiac capture sensor signal whether cardiac capture occurs in response to the second pacing pulse output; and adjusting the stimulation pulse output by a second step to a third pacing pulse output in response to detecting cardiac capture, the second step being less than the first step.
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Specification