Trending of conduction time for optimization of cardiac resynchronization therapy in cardiac rhythm management system
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Abstract
A method of optimizing cardiac resynchronization therapy delay over a patient'"'"'s full range of activity for use in operating an implantable cardiac pacing device and such a device are disclosed. The method includes measuring selected conduction time between selected sites in the heart for a plurality of beats and logging the values on a periodic repeating programmable basis to produce cumulative data and constructing a current template of conduction time in relation to one or more other sensed parameters of interest over a desired range of patient activity levels. The current template is used to derive suggested optimum pacing timing.
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Citations
96 Claims
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1-53. -53. (canceled)
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54. A method of optimizing cardiac resynchronization therapy over a patient'"'"'s full range of activity for use in operating an implantable cardiac pacing device comprising the steps of:
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(a) trending one or more selected cardiac conduction times over a range of corresponding activity levels of a patient;
(b) optimizing the timing of a related pacing pulse based on said trending of one or more conduction times; and
(c) wherein said trending step further comprises constructing a best-fit curve from scatter point data. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 88, 90, 96)
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68. A method of optimizing one or more inter-site pacing delays over a patient'"'"'s full range of activity for use in operating an implantable cardiac pacing device comprising the steps of:
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(a) measuring one or more conduction times selected from the group consisting of (RA-RV), (LA-LV), (RV-LV), (RA-LA), (RA-LV) and (LV-LV) for a plurality of beats and logging the values using a periodic repeating programmable sampling interval to produce cumulative data;
(b) constructing a best-fit curve from scatter point data of one or more selected conduction times in relation to one or more sensed parameters of interest selected from the group consisting of cycle length, activity level and minute ventilation over a desired range of patient activity levels from said cumulative data; and
(c) based on a then best-fit curve derive a suggested optimum pacing delay. - View Dependent Claims (69, 70, 71, 72, 73, 74)
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75. A method of optimizing atrio-ventricular delay over a patient'"'"'s full range of activity for use in operating an implantable cardiac pacing device comprising the steps of:
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measuring atrio-ventricular conduction time for a plurality of beats and logging the values on a periodic repeating programmable basis to produce cumulative data;
constructing a best-fit curve from scatter point data of atrio-ventricular conduction time in relation to one or more other sensed parameters of interest over a desired range of patient activity levels from the said cumulative data;
based on a then best-fit curve derive a suggested optimum atrio-ventricular delay. - View Dependent Claims (76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 89, 91, 92, 93, 94, 95)
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Specification