Method and apparatus for maintaining synchronized pacing
First Claim
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1. A method for operating a cardiac rhythm management device, comprising:
- sensing cardiac chambers designated as a rate chamber and a synchronized chamber through separate channels and generating sense signals upon detection of depolarization occurring in a chamber;
pacing the synchronized chamber upon expiration of an escape interval which is reset by a rate chamber sense and by a synchronized chamber pace, and wherein pacing of the synchronized chamber is inhibited during a synchronized chamber protective period that is initiated by a synchronized chamber sense; and
, delaying a pace to the synchronized chamber by a protective delay interval when the pace would otherwise occur within the synchronized chamber protective period.
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Abstract
A device and method for cardiac rhythm management in which a cardiac site is paced in accordance with a pacing mode that employs sense signals from a different cardiac site. A protective period triggered by the sensing of intrinsic activity at the paced site is used to delay pacing by a protective delay interval without otherwise disturbing the pacing algorithm.
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Citations
20 Claims
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1. A method for operating a cardiac rhythm management device, comprising:
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sensing cardiac chambers designated as a rate chamber and a synchronized chamber through separate channels and generating sense signals upon detection of depolarization occurring in a chamber;
pacing the synchronized chamber upon expiration of an escape interval which is reset by a rate chamber sense and by a synchronized chamber pace, and wherein pacing of the synchronized chamber is inhibited during a synchronized chamber protective period that is initiated by a synchronized chamber sense; and
,delaying a pace to the synchronized chamber by a protective delay interval when the pace would otherwise occur within the synchronized chamber protective period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A cardiac rhythm management device, comprising:
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sensing channels for sensing cardiac chambers designated as a rate chamber and a synchronized chamber and generating sense signals upon detection of depolarization occurring in a chamber;
a synchronized chamber pacing channel for delivering paces to the synchronized chamber;
a controller for controlling the delivery of paces in accordance with a programmed pacing mode; and
,wherein the controller is programmed to pace the synchronized chamber upon expiration of an escape interval which is reset by a rate chamber sense or a synchronized chamber pace, to inhibit pacing of the synchronized chamber during a synchronized chamber protective period that is initiated by a synchronized chamber sense, and to delay a pace to the synchronized chamber by a protective delay interval when the pace would otherwise occur within the synchronized chamber protection period. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A cardiac rhythm management device, comprising:
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means for sensing cardiac chambers designated as a rate chamber and a synchronized chamber through separate channels and generating sense signals upon detection of depolarization occurring in a chamber;
means for pacing the synchronized chamber upon expiration of an escape interval which is reset by a rate chamber sense and by a synchronized chamber pace, and wherein pacing of the synchronized chamber is inhibited during a synchronized chamber protective period that is initiated by a synchronized chamber sense; and
,means for delaying a pace to the synchronized chamber by a protective delay interval when the pace would otherwise occur within the synchronized chamber protective period. - View Dependent Claims (18, 19, 20)
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Specification