Apparatus and method for ventricular rate regularization with biventricular sensing
First Claim
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1. A method for operating a cardiac pacemaker, comprising:
- sensing right and left ventricular depolarizations through separate ventricular sensing channels and generating ventricular sense signals in accordance therewith;
pacing a ventricle upon expiration of a ventricular escape interval without receiving a ventricular sense from either ventricular sensing channel, wherein the ventricular escape interval starts with either a ventricular pace or a ventricular sense, the reciprocal of the ventricular escape interval being the lower rate limit of the pacemaker;
measuring an R-R interval associated with each ventricular sense, wherein an R-R interval is the time between a ventricular sense and the preceding ventricular sense or ventricular pace, the reciprocal of the R-R interval thus being the measured intrinsic ventricular rate; and
, adjusting the ventricular escape interval in accordance with a measured R-R interval so that the lower rate limit adjusts in accordance with changes in the measured intrinsic ventricular rate.
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Abstract
A method and system for operating a cardiac pacemaker which employs pacing therapy to regularize the ventricular rhythm together with biventricular sensing. Biventricular sensing allows the ventricular rate regularization to be accomplished with greater hemodynamic stability.
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Citations
26 Claims
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1. A method for operating a cardiac pacemaker, comprising:
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sensing right and left ventricular depolarizations through separate ventricular sensing channels and generating ventricular sense signals in accordance therewith;
pacing a ventricle upon expiration of a ventricular escape interval without receiving a ventricular sense from either ventricular sensing channel, wherein the ventricular escape interval starts with either a ventricular pace or a ventricular sense, the reciprocal of the ventricular escape interval being the lower rate limit of the pacemaker;
measuring an R-R interval associated with each ventricular sense, wherein an R-R interval is the time between a ventricular sense and the preceding ventricular sense or ventricular pace, the reciprocal of the R-R interval thus being the measured intrinsic ventricular rate; and
,adjusting the ventricular escape interval in accordance with a measured R-R interval so that the lower rate limit adjusts in accordance with changes in the measured intrinsic ventricular rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A cardiac pacemaker, comprising:
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ventricular sensing channels for sensing right and left ventricular depolarizations and generating ventricular sense signals in accordance therewith;
a ventricular pacing channel for pacing a ventricle;
a controller for controlling operation of the pacemaker such that a ventricular pace is delivered upon expiration of a ventricular escape interval without receiving a ventricular sense from either ventricular sensing channel, wherein the ventricular escape interval starts with either a ventricular pace or a ventricular sense, the reciprocal of the ventricular escape interval being the lower rate limit of the pacemaker;
wherein the controller is configured to measure an R-R interval associated with each ventricular sense, wherein an R-R interval is the time between a ventricular sense and the preceding ventricular sense or ventricular pace, the reciprocal of the R-R interval thus being the measured intrinsic ventricular rate; and
,wherein the controller is configured to adjust the ventricular escape interval in accordance with a measured R-R interval so that the lower rate limit adjusts in accordance with changes in the measured intrinsic ventricular rate. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification