Systems and methods for leadless cardiac resynchronization therapy
First Claim
1. A method of using a subcutaneous device (SD) in a patient and a leadless pacing device (LPD) in the patient'"'"'s heart, the method comprising:
- sensing electrical signals which includes moderately lengthened QRS data from the patient'"'"'s heart using the SD;
employing the SD to determine whether cardiac resynchronization pacing therapy (CRT pacing) is appropriate based upon the QRS duration in the sensed electrical signals;
employing the SD to determine timing of CRT pacing pulses for delivery to cardiac tissue through the LPD and sending signals indicative thereof to the LPD responsive to the sent indicative signals;
delivering the CRT pacing pulses to the heart using the LPD;
thereafter sensing subsequent electrical signals from the patient'"'"'s heart using the SD; and
determining, by the SD based on the subsequent electrical signals, whether the CRT pacing by the LPD provided efficacious resynchronization and whether the delivery and timing of subsequent CRT pacing pulses should be modified.
1 Assignment
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Accused Products
Abstract
Techniques and systems for monitoring cardiac arrhythmias and delivering electrical stimulation therapy using a subcutaneous device (e.g. subcutaneous implantable (SD)) is described. In one or more other embodiments, SD is implanted into a patient'"'"'s heart. Electrical signals are then sensed which includes moderately lengthened QRS duration data from the patient'"'"'s heart. A determination is made as to whether cardiac resynchronization pacing therapy (CRT pacing) is appropriate based upon the moderately lengthened QRS duration in the sensed electrical signals. The CRT pacing pulses are delivered to the heart using electrodes. In one or more embodiments, the SD can switch between fusion pacing and biventricular pacing based upon data (e.g. moderately lengthened QRS, etc.) sensed from the heart.
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Citations
26 Claims
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1. A method of using a subcutaneous device (SD) in a patient and a leadless pacing device (LPD) in the patient'"'"'s heart, the method comprising:
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sensing electrical signals which includes moderately lengthened QRS data from the patient'"'"'s heart using the SD; employing the SD to determine whether cardiac resynchronization pacing therapy (CRT pacing) is appropriate based upon the QRS duration in the sensed electrical signals; employing the SD to determine timing of CRT pacing pulses for delivery to cardiac tissue through the LPD and sending signals indicative thereof to the LPD responsive to the sent indicative signals; delivering the CRT pacing pulses to the heart using the LPD; thereafter sensing subsequent electrical signals from the patient'"'"'s heart using the SD; and determining, by the SD based on the subsequent electrical signals, whether the CRT pacing by the LPD provided efficacious resynchronization and whether the delivery and timing of subsequent CRT pacing pulses should be modified. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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sensing electrical signals which includes moderately lengthened QRS duration data from the patient'"'"'s heart using a subcutaneous device; determining whether cardiac resynchronization pacing therapy (CRT pacing) is appropriate based upon the moderately lengthened QRS duration in the sensed electrical signals; and delivering the CRT pacing pulses to the heart using a leadless pacing device (LPD). - View Dependent Claims (18, 19, 20, 21)
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22. A system for cardiac pacing comprising:
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a subcutaneous device (SD) in a patient; a leadless pacing device (LPD) in the patient'"'"'s heart; sensing means for sensing electrical signals which includes moderately lengthened QRS data from the patient'"'"'s heart using the SD; processing means for employing the SD to determine whether cardiac resynchronization pacing therapy (CRT pacing) is appropriate based upon the QRS duration in the sensed electrical signals; processing means for employing the SD to determine timing of CRT pacing pulses for delivery to cardiac tissue through the LPD and sending signals indicative thereof to the LPD responsive to the sent indicative signals; delivering means for delivering the CRT pacing pulses to the heart using the LPD; thereafter sensing means for sensing subsequent electrical signals from the patient'"'"'s heart using the SD; and processing means for determining, by the SD based on the subsequent electrical signals, whether the CRT pacing by the LPD provided efficacious resynchronization and whether the delivery and timing of subsequent CRT pacing pulses should be modified. - View Dependent Claims (23, 24, 25, 26)
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Specification