Implantable cardiac stimulation device with automatic evoked response sensing electrode configuration selection and method
First Claim
1. An implantable cardiac stimulation device for applying pacing stimulation pulses to a heart and sensing evoked responses to the pacing stimulation pulses, the device comprising:
- at least one lead adapted for placement in a chamber of a heart, the at least one lead comprising a plurality of electrodes that define a plurality of pacing configurations and a plurality of sensing configurations for the chamber;
a pulse generator that applies the stimulation pacing pulses to the heart in accordance with a selected one of the pacing configurations;
a sensor control that maintains lists of potential sensing configurations for each of the pacing configurations, wherein the sensor control is operative to test each sensing configuration in the list for the selected pacing configuration, and to automatically select an evoked response sensing electrode configuration based on the results of the test; and
a sensor that senses the evoked responses with the automatically selected evoked response sensing electrode configuration.
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Abstract
An implantable cardiac stimulation device applies pacing stimulation pulses to a heart and senses evoked responses to the pacing stimulation pulses. A pulse generator applies the stimulation pacing pulses to the heart in accordance with a pacing configuration. A sensor control selects an evoked response sensing electrode configuration from among a plurality of evoked response sensing electrode configurations in response to the pacing configuration. A sensor is then programmed to sense the evoked responses with the selected evoked response sensing electrode configuration. In accordance with a preferred embodiment, signal-to-noise ratios obtained with the various electrode configurations are used to select a best electrode configuration for sensing evoked responses.
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Citations
19 Claims
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1. An implantable cardiac stimulation device for applying pacing stimulation pulses to a heart and sensing evoked responses to the pacing stimulation pulses, the device comprising:
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at least one lead adapted for placement in a chamber of a heart, the at least one lead comprising a plurality of electrodes that define a plurality of pacing configurations and a plurality of sensing configurations for the chamber;
a pulse generator that applies the stimulation pacing pulses to the heart in accordance with a selected one of the pacing configurations;
a sensor control that maintains lists of potential sensing configurations for each of the pacing configurations, wherein the sensor control is operative to test each sensing configuration in the list for the selected pacing configuration, and to automatically select an evoked response sensing electrode configuration based on the results of the test; and
a sensor that senses the evoked responses with the automatically selected evoked response sensing electrode configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An implantable cardiac stimulation device for sensing evoked responses of a heart, the device comprising:
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means for defining a plurality of pacing configurations and a plurality of sensing configurations for a chamber of the heart;
stimulating means for stimulating the heart in accordance with a selected one of the pacing configurations for producing evoked responses of the heart;
control means for maintaining lists of potential sensing configurations for each of the pacing configurations, wherein the control means comprises means for testing each sensing configuration in the list for the selected pacing configuration, and to automatically select an evoked response sensing electrode configuration based on the results of the test;
sensing means for sensing the evoked responses; and
coupling means for coupling the automatically selected evoked response sensing electrode configuration to the sensing means. - View Dependent Claims (9, 10, 11, 12, 13)
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14. In a cardiac stimulation device, a method of sensing evoked responses of a heart, the method comprising:
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inserting at least one lead in a chamber of a heart, the at least one lead comprising a plurality of electrodes that define a plurality of pacing configurations and a plurality of sensing configurations for the chamber;
stimulating the heart in accordance with a selected one of the pacing configurations;
maintaining lists of potential sensing configurations for each of the pacing configurations;
testing each sensing configuration in the list corresponding with the selected pacing configuration;
automatically selecting an evoked response sensing electrode configuration based on the results of the test; and
sensing the evoked responses with the automatically selected evoked response sensing electrode configuration. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification