Heart-sounds based adaptive cardiac resynchronization therapy timing parameter optimization system
First Claim
1. A method, comprising:
- sensing a first cardiac signal comprising first events corresponding to cardiac electrical events;
sensing a second cardiac signal comprising second events corresponding to cardiac hemodynamic events; and
enabling a processor to;
measure a cardiac conduction time interval using the first cardiac signal,control a signal generator to deliver a pacing therapy and adjust a first pacing control parameter to a plurality of settings during the pacing therapy delivery,measure a hemodynamic parameter value from the second cardiac signal corresponding to each of the plurality of settings,identify an optimal setting from the plurality of settings in response to the measured hemodynamic parameter values,use the identified optimal setting and the measured cardiac conduction time interval to solve for a first patient-specific equation configured to be used to adjust the first pacing control parameter based on cardiac conduction time interval, the first patient-specific equation defining the first pacing control parameter as a function of the cardiac conduction time interval, anduse the first patient-specific equation to compute a setting for the first pacing control parameter based on the cardiac conduction time interval.
1 Assignment
0 Petitions
Accused Products
Abstract
A medical device and associated method for controlling a cardiac pacing therapy sense a first cardiac signal including events corresponding to cardiac electrical events and a second cardiac signal including events corresponding to cardiac hemodynamic events. A processor is enabled to measure a cardiac conduction time interval using the first cardiac signal and control a signal generator to deliver a pacing therapy. A pacing control parameter is adjusted to a plurality of settings during the pacing therapy delivery. A hemodynamic parameter value is measured from the second cardiac signal during application of each of the control parameter settings. The processor identifies an optimal setting from the plurality of settings and solves for a patient-specific equation defining the pacing control parameter as a function of the cardiac conduction time interval.
29 Citations
32 Claims
-
1. A method, comprising:
-
sensing a first cardiac signal comprising first events corresponding to cardiac electrical events; sensing a second cardiac signal comprising second events corresponding to cardiac hemodynamic events; and enabling a processor to; measure a cardiac conduction time interval using the first cardiac signal, control a signal generator to deliver a pacing therapy and adjust a first pacing control parameter to a plurality of settings during the pacing therapy delivery, measure a hemodynamic parameter value from the second cardiac signal corresponding to each of the plurality of settings, identify an optimal setting from the plurality of settings in response to the measured hemodynamic parameter values, use the identified optimal setting and the measured cardiac conduction time interval to solve for a first patient-specific equation configured to be used to adjust the first pacing control parameter based on cardiac conduction time interval, the first patient-specific equation defining the first pacing control parameter as a function of the cardiac conduction time interval, and use the first patient-specific equation to compute a setting for the first pacing control parameter based on the cardiac conduction time interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A medical device for controlling and delivering a cardiac pacing therapy, the device comprising:
-
a plurality of electrodes for sensing a first cardiac signal comprising first events corresponding to cardiac electrical events; a physiological sensor for sensing a second cardiac signal comprising second events corresponding to cardiac hemodynamic events; a signal generator for delivering a pacing therapy to a patient'"'"'s heart via the plurality of electrodes; and a processor to; measure a cardiac conduction time interval using the first cardiac signal, control the signal generator to deliver a pacing therapy and adjust a first pacing control parameter to a plurality of settings during the pacing therapy delivery, measure a hemodynamic parameter value from the second cardiac signal corresponding to each of the plurality of settings, identify an optimal setting from the plurality of settings in response to the measured hemodynamic parameter values, uses the identified optimal setting and the measured cardiac conduction time interval to solve for a first patient-specific equation configured to be used to adjust the first pacing control parameter based on cardiac conduction time interval, the first patient-specific equation defining the first pacing control parameter as a function of the cardiac conduction time interval, and use the first patient-specific equation to compute a setting for the first pacing control parameter based on the cardiac conduction time interval. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
-
29. A non-transitory computer-readable medium storing instructions which cause a medical device to perform a method for controlling a cardiac pacing therapy, the method comprising:
-
sensing a first cardiac signal comprising first events corresponding to cardiac electrical events; sensing a second cardiac signal comprising second events corresponding to cardiac hemodynamic events; measuring a cardiac conduction time interval using the first cardiac signal; controlling a signal generator to deliver a pacing therapy and adjust a first pacing control parameter to a plurality of settings during the pacing therapy delivery; measuring a hemodynamic parameter value from the second cardiac signal corresponding to each of the plurality of settings; identifying an optimal setting from the plurality of settings in response to the measured hemodynamic parameter values; using the identified optimal setting and the measured cardiac conduction time interval to solve for a first patient-specific equation configured to be used to adjust the first pacing control parameter based on cardiac conduction time interval, the first patient-specific equation defining the first pacing control parameter as a function of the cardiac conduction time interval; and using the first patient-specific equation to compute a setting for the first pacing control parameter based on the cardiac conduction time interval.
-
-
30. A method, comprising:
-
sensing a first cardiac signal comprising first events corresponding to cardiac electrical events; sensing a second cardiac signal comprising second events corresponding to cardiac hemodynamic events; and enabling a processor to; measure a cardiac conduction time interval using the first cardiac signal, cardiac conduction time interval being one of an AV conduction time interval, a P-wave duration, and a QRS duration, control a signal generator to deliver a pacing therapy and adjust a first pacing control parameter to a plurality of settings during the pacing therapy delivery, measure a hemodynamic parameter value from the second cardiac signal corresponding to each of the plurality of settings, identify an optimal setting from the plurality of settings in response to the measured hemodynamic parameter values, use the identified optimal setting and the measured cardiac conduction time interval to solve for a first patient-specific equation configured to be used to adjust the first pacing control parameter based on cardiac conduction time interval, the first patient-specific equation defining the first pacing control parameter as a function of the cardiac conduction time interval, use the first patient-specific equation to compute a setting for the first pacing control parameter based on the cardiac conduction time interval, repeat measuring the cardiac conduction time interval to obtain an updated conduction time interval, and in response to obtaining the updated cardiac conduction time interval use the first patient-specific equation to compute an updated setting for the first pacing control parameter based on the updated conduction time interval. - View Dependent Claims (31, 32)
-
Specification