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US 7,120,494 B2Granted
System and method for eliminating cross-talk due to far-field signals
AssigneeCardiac Pacemakers, Inc.
InventorsJeffrey E. Stahmann, Rene H. Wentkowski, Andrew P. Kramer
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Abstract
A method and system for reducing the effects of far-field signals in a cardiac rhythm management device. Such far-field signals can be produced by contralateral ventricular depolarization and can cause cross-talk between ventricular sensing channels.
Claims20
A method for operating a cardiac rhythm management device, comprising:
- sensing a first heart chamber and a contralateral second heart chamber through separate sensing channels, wherein the first and second heart chambers may be either the paired ventricles or the paired atria, and generating sense signals upon detection of depolarization occurring in the chambers;
- pacing at least one of the heart chambers upon expiration of an escape interval without receipt of a sense signal from the first chamber sensing channel;
- rendering the second chamber sensing channel refractory for a specified time interval in order to avoid sensing a far-field first chamber signal and detecting a second chamber depolarization during the same cardiac cycle.
A cardiac rhythm management device, comprising:
- first and second sensing channels for sensing depolarizations and generating sense signals in accordance therewith
- a pacing channel for delivering pacing pulses to one of the heart chambers;
- a controller for controlling the delivery of paces in accordance with a programmed pacing mode;
- wherein the controller is programmed to:
- interpret the sense signals from the first and second sensing channels as senses from a first and a second heart chamber, respectively, wherein the first and second heart chambers may be either the paired ventricles or the paired atria, and
- render the second chamber sensing channel refractory for a specified time interval in order to avoid sensing a far-field first chamber signal and detecting a second chamber depolarization during the same cardiac cycle.
3 more elements
Dependencies are inferred from the claim text.