Cardiac activity sensing during pacing in implantable devices
First Claim
1. A medical device, comprising:
- a first plurality of electrodes forming a first electrode configuration to sense cardiac activity;
a second plurality of electrodes forming a second electrode configuration to sense cardiac activity;
a third plurality of electrodes to deliver a stimulation pulse in response to the sensed cardiac activity;
a microprocessor determining whether an escape interval associated with the delivered stimulation pulse is less than a rate limit interval; and
a control circuit switching from the first plurality of electrodes to the second plurality of electrodes in response to the escape interval being less than the rate limit interval.
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Abstract
A method and device for sensing cardiac activity that includes a first plurality of electrodes forming a first electrode configuration to sense cardiac activity, a second plurality of electrodes forming a second electrode configuration to sense cardiac activity, and a third plurality of electrodes to deliver a stimulation pulse in response to the sensed cardiac activity. A microprocessor determines whether an escape interval associated with the delivered stimulation pulse is less than a rate limit interval, and a control circuit switches from the first plurality of electrodes to the second plurality of electrodes in response to the escape interval being less than the rate limit interval.
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Citations
20 Claims
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1. A medical device, comprising:
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a first plurality of electrodes forming a first electrode configuration to sense cardiac activity;
a second plurality of electrodes forming a second electrode configuration to sense cardiac activity;
a third plurality of electrodes to deliver a stimulation pulse in response to the sensed cardiac activity;
a microprocessor determining whether an escape interval associated with the delivered stimulation pulse is less than a rate limit interval; and
a control circuit switching from the first plurality of electrodes to the second plurality of electrodes in response to the escape interval being less than the rate limit interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16)
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11. A method for sensing cardiac activity in a medical device, comprising:
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sensing cardiac activity utilizing a first sensing configuration;
delivering a stimulation pulse in response to the sensed cardiac activity;
determining whether an escape interval associated with the delivery of the stimulation pulse is less than a rate limit interval; and
sensing cardiac activity utilizing a second sensing configuration in response to the escape interval being less than the rate limit interval. - View Dependent Claims (12, 17, 18, 19, 20)
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Specification