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.
57 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