Method and system for improved estimation of time of left ventricular pacing with respect to intrinsic right ventricular activation in cardiac resynchronization therapy
First Claim
1. A method of cardiac pacing using an implanted pulse generator comprising:
- a) determining a baseline rhythm including a baseline atrial event and a baseline right ventricular (RV) event from one or more implanted electrodes coupled to the pulse generator;
b) determining a pre-excitation interval from the baseline atrial event and the baseline RV event;
c) using a body surface electrode to acquire an earliest time of RV activation (T1) in an intrinsic rhythm;
d) using an implanted electrode to acquire an intrinsic rhythm activation time (T2);
e) determining an offset defined as a difference between T2 and T1;
f) applying a correction factor to the pre-excitation interval for LV only pacing based on the offset; and
g) configuring a processor to signal the pulse generator to deliver electrical stimuli to a left ventricle (LV) using the corrected pre-excitation interval before RV sensing time.
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Accused Products
Abstract
A method and system of cardiac pacing is disclosed. A baseline rhythm is determined. The baseline rhythm includes a baseline atrial event and a baseline right ventricular RV event from an implanted cardiac lead or a leadless device, a pre-excitation interval determined from the baseline atrial event and the baseline RV event, and a plurality of activation times determined from a plurality of body-surface electrodes. A determination is made as to whether a time interval measured from an atrial event to a RV event is disparate from another time interval measured from the atrial event to an earliest RV activation time of the plurality of activation times. A correction factor is applied to the pre-excitation interval to obtain a corrected pre-excitation interval in response to determining the RV event is disparate from the earliest RV activation time. The processor is configured to signal the pulse generator to deliver electrical stimuli to a left ventricle (LV) using the corrected pre-excitation interval before RV sensing time.
283 Citations
21 Claims
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1. A method of cardiac pacing using an implanted pulse generator comprising:
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a) determining a baseline rhythm including a baseline atrial event and a baseline right ventricular (RV) event from one or more implanted electrodes coupled to the pulse generator; b) determining a pre-excitation interval from the baseline atrial event and the baseline RV event; c) using a body surface electrode to acquire an earliest time of RV activation (T1) in an intrinsic rhythm; d) using an implanted electrode to acquire an intrinsic rhythm activation time (T2); e) determining an offset defined as a difference between T2 and T1; f) applying a correction factor to the pre-excitation interval for LV only pacing based on the offset; and g) configuring a processor to signal the pulse generator to deliver electrical stimuli to a left ventricle (LV) using the corrected pre-excitation interval before RV sensing time. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. System of cardiac pacing using an implanted pulse generator comprising:
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a) means for determining a baseline rhythm including a baseline atrial event and a baseline right ventricular (RV) event from one or more electrodes; b) determining a pre-excitation interval from the baseline atrial event and the baseline RV event; c) using a body surface electrode to acquire an earliest time of RV activation (T1) in an intrinsic rhythm; d) using an implanted electrode to acquire an intrinsic rhythm activation time (T2); e) determining an offset defined as a difference between T2 and T1; f) applying a correction factor to the pre-excitation interval for LV only pacing based on the offset; and g) configuring a processor to signal the pulse generator to deliver electrical stimuli to a left ventricle (LV) using the corrected pre-excitation interval before RV sensing time. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory, computer-readable storage medium comprising instructions that, when executed, cause a processor to perform a method comprising:
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a) determining a baseline rhythm including a baseline atrial event and a baseline right ventricular (RV) event from one or more electrodes; b) determining a pre-excitation interval from the baseline atrial event and the baseline RV event; c) using a body surface electrode to acquire an earliest time of RV activation (T1) in an intrinsic rhythm; d) using an implanted electrode to acquire an intrinsic rhythm activation time (T2); e) determining an offset defined as a difference between T2 and T1; f) applying a correction factor to the pre-excitation interval for LV only pacing based on the offset; and g) configuring a processor to signal the pulse generator to deliver electrical stimuli to a left ventricle (LV) using the corrected pre-excitation interval before RV sensing time. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification