Mode transition timing for synchronized pacing
First Claim
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1. A method for operating a cardiac rhythm management device, comprising:
- pacing a synchronized pacing site in accordance with a first pacing mode in which the synchronized site is paced at a specified pacing instant defined with respect to expiration of an escape interval which is reset by senses or paces occurring at a rate site;
transitioning to a second pacing mode in which the synchronized site is paced at an earlier specified pacing instant defined with respect to expiration of an escape interval than in the first pacing mode; and
, delaying a pace to the synchronized site during a cardiac cycle in which the transition occurs if the pacing instant occurs at a pacing interval less than a specified minimum pacing interval.
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Abstract
A system and method for avoiding short-interval paces during pacing mode transitions. The method may be particularly useful in switching to or from a biventricular pacing mode.
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Citations
19 Claims
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1. A method for operating a cardiac rhythm management device, comprising:
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pacing a synchronized pacing site in accordance with a first pacing mode in which the synchronized site is paced at a specified pacing instant defined with respect to expiration of an escape interval which is reset by senses or paces occurring at a rate site;
transitioning to a second pacing mode in which the synchronized site is paced at an earlier specified pacing instant defined with respect to expiration of an escape interval than in the first pacing mode; and
,delaying a pace to the synchronized site during a cardiac cycle in which the transition occurs if the pacing instant occurs at a pacing interval less than a specified minimum pacing interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A cardiac rhythm management device, comprising:
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sensing/pacing channels for sensing and pacing a plurality of sites;
a controller for controlling the delivery of paces to a pacing site in accordance with a programmed pacing mode, wherein the controller is programmed to;
pace a selected site designated as a synchronized site in accordance with a first pacing mode in which the synchronized site is paced at a specified pacing instant defined with respect to expiration of an escape interval which is reset by a sense or pace occurring at another site designated as the rate site;
transition to a second pacing mode in which the synchronized site is paced at an earlier specified pacing instant defined with respect to expiration of an escape interval than in the first pacing mode; and
,delay a pace to the synchronized site during a cardiac cycle in which the transition occurs if the pacing instant occurs at a pacing interval less than a specified minimum pacing interval. - View Dependent Claims (14, 15, 16, 17)
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18. A method for operating a cardiac rhythm management device, comprising:
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pacing a synchronized pacing site in accordance with a first pacing mode in which the synchronized site is paced at a specified pacing instant defined with respect to expiration of an escape interval which is reset by senses or paces occurring at a rate site;
transitioning to a second pacing mode in which the synchronized site is paced at an earlier specified pacing instant defined with respect to expiration of an escape interval than in the first pacing mode; and
,inhibiting a pace to the synchronized site during a cardiac cycle in which the transition occurs if the pacing instant occurs at a pacing interval less than a specified minimum pacing interval.
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19. A cardiac rhythm management device, comprising:
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sensing/pacing channels for sensing and pacing a plurality of sites;
a controller for controlling the delivery of paces to a pacing site in accordance with a programmed pacing mode, wherein the controller is programmed to;
pace a selected site designated as a synchronized site in accordance with a first pacing mode in which the synchronized site is paced at a specified pacing instant defined with respect to expiration of an escape interval which is reset by a sense or pace occurring at another site designated as the rate site;
transition to a second pacing mode in which the synchronized site is paced at an earlier specified pacing instant defined with respect to expiration of an escape interval than in the first pacing mode; and
,inhibit a pace to the synchronized site during a cardiac cycle in which the transition occurs if the pacing instant occurs at a pacing interval less than a specified minimum pacing interval.
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Specification