Leadless pacemaker system
First Claim
1. A leadless cardiac device comprisinga signal generator module configured to deliver pacing pulses to an atrium;
- a processing module configured to;
detect a ventricular activation event,determine a length of an interval between the ventricular activation event and a previous atrial event that preceded the ventricular activation event,schedule a time at which to deliver a pacing pulse to the atrium based on the length of the interval, andcontrol the signal generator module to deliver the pacing pulse at the scheduled time;
a housing configured for implantation within the atrium, wherein the housing encloses the signal generator and the processing module; and
a memory that stores a baseline atrioventricular (AV) value that is an expected value of the interval between the ventricular activation event and the previous atrial event during normal AV conduction of the heart;
wherein the processing module is configured to;
compare the determined length of the interval to the baseline AV value, andschedule the time at which to deliver the pacing pulse to the atrium in order to maintain a baseline atrial pacing rate based on the comparison, andwherein the processing module is configured to continue to compare the stored baseline atrioventricular (AV) value, unchanged, to subsequent intervals.
1 Assignment
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Accused Products
Abstract
A device includes a signal generator module, a processing module, and a housing. The signal generator module is configured to deliver pacing pulses to an atrium. The processing module is configured to detect a ventricular activation event and determine a length of an interval between the ventricular activation event and a previous atrial event that preceded the ventricular activation event. The processing module is further configured to schedule a time at which to deliver a pacing pulse to the atrium based on the length of the interval and control the signal generator module to deliver the pacing pulse at the scheduled time. The housing is configured for implantation within the atrium. The housing encloses the stimulation generator and the processing module.
188 Citations
16 Claims
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1. A leadless cardiac device comprising
a signal generator module configured to deliver pacing pulses to an atrium; -
a processing module configured to; detect a ventricular activation event, determine a length of an interval between the ventricular activation event and a previous atrial event that preceded the ventricular activation event, schedule a time at which to deliver a pacing pulse to the atrium based on the length of the interval, and control the signal generator module to deliver the pacing pulse at the scheduled time; a housing configured for implantation within the atrium, wherein the housing encloses the signal generator and the processing module; and a memory that stores a baseline atrioventricular (AV) value that is an expected value of the interval between the ventricular activation event and the previous atrial event during normal AV conduction of the heart; wherein the processing module is configured to; compare the determined length of the interval to the baseline AV value, and schedule the time at which to deliver the pacing pulse to the atrium in order to maintain a baseline atrial pacing rate based on the comparison, and wherein the processing module is configured to continue to compare the stored baseline atrioventricular (AV) value, unchanged, to subsequent intervals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A leadless cardiac device comprising:
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a signal generator module configured to deliver pacing pulses to an atrium; a processing module configured to; detect a ventricular activation event, determine a length of an interval between the ventricular activation event and a previous atrial event that preceded the ventricular activation event, schedule a time at which to deliver a pacing pulse to the atrium based on the length of the interval, and control the signal generator module to deliver the pacing pulse at the scheduled time; a housing configured for implantation within the atrium, wherein the housing encloses the signal generator and the processing module; and a memory that stores a baseline atrioventricular (AV) value that is an expected value of the interval between the ventricular activation event and the previous atrial event during normal AV conduction of the heart; wherein the processing module is configured to; compare the determined length of the interval to the baseline AV value, schedule the time at which to deliver the pacing pulse to the atrium based on the comparison, identify the interval as having one of a normal duration, a short duration, or a long duration based on the comparison, and schedule the time at which to deliver the pacing pulse to the atrium in order to maintain a baseline atrial pacing rate based on whether the interval is identified as having a normal duration, a short duration, or a long duration. - View Dependent Claims (12)
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13. A leadless cardiac device comprising:
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a signal generator module configured to deliver pacing pulses to an atrium; a processing module configured to; detect a ventricular activation event, determine a length of an interval between the ventricular activation event and a previous atrial event that preceded the ventricular activation event, schedule a time at which to deliver a pacing pulse to the atrium based on the length of the interval, and control the signal generator module to deliver the pacing pulse at the scheduled time; a housing configured for implantation within the atrium, wherein the housing encloses the signal generator and the processing module; and a memory that stores a baseline atrioventricular (AV) value that is an expected value of the interval between the ventricular activation event and the previous atrial event during normal AV conduction of the heart; wherein the processing module is configured to; compare the determined length of the interval to the baseline AV value, identify the interval as having a normal duration when the determined length of the interval is approximately equal to the baseline AV value, identify the interval as having a short duration when the determined length of the interval is less than the baseline AV value by a threshold amount, and schedule the time at which to deliver the pacing pulse to the atrium at a delay following the ventricular activation event based on whether the interval is identified as having the normal duration or the short duration, wherein the delay is increased responsive to an identified short duration interval. - View Dependent Claims (14)
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15. A leadless cardiac device comprising:
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a signal generator module configured to deliver pacing pulses to an atrium; a processing module configured to; detect a ventricular activation event, determine a length of an interval between the ventricular activation event and a previous atrial event that preceded the ventricular activation event, schedule a time at which to deliver a pacing pulse to the atrium based on the length of the interval, and control the signal generator module to deliver the pacing pulse at the scheduled time; a housing configured for implantation within the atrium, wherein the housing encloses the signal generator and the processing module; and a memory that stores a baseline atrioventricular (AV) value that is an expected value of the interval between the ventricular activation event and the previous atrial event during normal AV conduction of the heart; wherein the processing module is configured to; compare the determined length of the interval to the baseline AV value, identify the interval as having a normal duration when the determined length of the interval is approximately equal to the baseline AV value, identify the interval as having a long duration when the determined length of the interval is greater than the baseline AV value by a threshold amount, and schedule the time at which to deliver the pacing pulse to the atrium at a delay following the ventricular activation event based on whether the interval is identified as having the normal duration or the long duration, wherein the delay is decreased responsive to an identified long duration interval. - View Dependent Claims (16)
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Specification