Pacing output configuration selection for cardiac resynchronization therapy patients
First Claim
1. A method, implementable at least in part in a cardiac therapy device, for delivering cardiac resynchronization therapy to a patient, the method comprising:
- sensing cardiac electrical signals from a plurality of different left ventricular electrode sites;
measuring, for each left ventricular electrode site, a timing interval between first and second cardiac electrical signal features associated with left ventricular depolarization, the timing interval associated with a degree of responsiveness of each left ventricular electrode site to cardiac resynchronization therapy (CRT);
comparing at least some of the timing intervals of different left ventricular electrode sites to one another; and
determining a pacing output configuration that provides improved patient responsiveness to CRT based on the comparison of the timing interval measurements, wherein determining the pacing output configuration comprises selecting at least one left ventricular electrode site from the plurality of left ventricular electrode sites based on the timing interval measurements, wherein comparing and determining are implemented at least in part by circuitry of a device.
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Accused Products
Abstract
Cardiac therapy systems include multiple electrodes respectively positionable at multiple left ventricular electrode sites. A pulse generator is coupled to the electrodes and configured to deliver a cardiac resynchronization therapy (CRT). A processor is configured to measure, for each left ventricular electrode site, a timing interval between first and second cardiac signal features associated with left ventricular depolarization. The timing interval is associated with a degree of responsiveness of each left ventricular electrode site to CRT. The processor is configured to determine a pacing output configuration that provides improved patient responsiveness to CRT based on the timing interval measurements and to select at least one left ventricular electrode site from the plurality of left ventricular electrode sites based on the timing interval measurements. The processor may be configured to monitor for a change in hemodynamic status of the patient based on a change in the timing interval.
33 Citations
20 Claims
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1. A method, implementable at least in part in a cardiac therapy device, for delivering cardiac resynchronization therapy to a patient, the method comprising:
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sensing cardiac electrical signals from a plurality of different left ventricular electrode sites; measuring, for each left ventricular electrode site, a timing interval between first and second cardiac electrical signal features associated with left ventricular depolarization, the timing interval associated with a degree of responsiveness of each left ventricular electrode site to cardiac resynchronization therapy (CRT); comparing at least some of the timing intervals of different left ventricular electrode sites to one another; and determining a pacing output configuration that provides improved patient responsiveness to CRT based on the comparison of the timing interval measurements, wherein determining the pacing output configuration comprises selecting at least one left ventricular electrode site from the plurality of left ventricular electrode sites based on the timing interval measurements, wherein comparing and determining are implemented at least in part by circuitry of a device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A cardiac therapy system, comprising:
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multiple electrodes on a lead respectively positionable at multiple locations within at least a left ventricle for sensing cardiac electrical signals from a plurality of left ventricular electrode sites; a pulse generator coupled to the multiple electrodes and configured to deliver at least a cardiac resynchronization therapy (CRT); and a processor coupled to the multiple electrodes and the pulse generator, the processor configured to measure, for each left ventricular electrode site, a timing interval between first and second cardiac signal features associated with left ventricular depolarization, the timing interval associated with a degree of responsiveness of each left ventricular electrode site to CRT, the processor configured to compare at least some of the timing intervals of different left ventricular electrode sites to one another, determine a pacing output configuration that provides improved patient responsiveness to CRT based on the comparison of the timing interval measurements, and to select at least one left ventricular electrode site from the plurality of left ventricular electrode sites based on the determined pacing output configuration. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification