System providing ventricular pacing and biventricular coordination
First Claim
1. A method, including:
- obtaining atrio-ventricular (AV) intervals between atrial events and successive ventricular events;
computing a first indicated AV interval based at least on a most recent AV interval duration and a previous value of the first indicated AV interval; and
providing pacing therapy, based on the first indicated AV interval.
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Accused Products
Abstract
A cardiac rhythm management system includes techniques for computing an indicated pacing interval, AV delay, or other timing interval. In one embodiment, a variable indicated pacing interval is computed based at least in part on an underlying intrinsic heart rate. The indicated pacing interval is used to time the delivery of biventricular coordination therapy even when ventricular heart rates are irregular, such as in the presence of atrial fibrillation. In another embodiment, a variable filter indicated AV interval is computed based at least in part on an underlying intrinsic AV interval. The indicated AV interval is used to time the delivery of atrial tracking biventricular coordination therapy when atrial heart rhythms are not arrhythmic. Other indicated timing intervals may be similarly determined. The indicated pacing interval, AV delay, or other timing interval can also be used in combination with a sensor indicated rate indicator.
504 Citations
20 Claims
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1. A method, including:
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obtaining atrio-ventricular (AV) intervals between atrial events and successive ventricular events;
computing a first indicated AV interval based at least on a most recent AV interval duration and a previous value of the first indicated AV interval; and
providing pacing therapy, based on the first indicated AV interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 19, 20)
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12. A cardiac rhythm management system, including:
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an atrial sensing circuit;
a ventricular sensing circuit;
a controller, the controller including;
an atrio-ventricular (AV) interval timer, obtaining AV intervals between atrial events and successive ventricular events;
a first register, for storing a first indicated AV interval; and
a filter, updating the first indicated AV interval based on a most recent AV interval provided by the AV interval timer and previous value of the first indicated AV interval stored the first register; and
a ventricular therapy circuit, providing pacing therapy based at least partially on the first indicated AV interval. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification