Smart delay for intermittent stress therapy
First Claim
1. A method for delivering pacing pulses, comprising:
- sensing intrinsic atrioventricular (AV) intervals;
using the intrinsic AV interval and a predetermined equation relating the AV interval to a calculated optimal AV delay to provide a maximum positive rate of left ventricular pressure change during systole; and
calculating an AV delay using a predetermined percentage of the calculated optimal AV delay to deliver ventricular pacing pulses, wherein the predetermined percentage is less than 100%, to provide a desired level of stress by introducing or augmenting dyssynchrony for cardiac protective pacing therapy (CPPT) to provide a cardiac conditioning therapy to improve autonomic balance.
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Abstract
A pacing system delivers cardiac protection pacing to protect the heart from injuries. The pacing system receives a set of inputs and calculates parameters for delivering optimized cardiac protection pacing tailored for different stress levels. The system automatically adjusts heart rate to optimize cardiac protection pacing in a closed-loop system. In one embodiment, a method for delivering pacing pulses for cardiac protection is provided. Intrinsic atrioventricular (AV) intervals are sensed. The intrinsic AV interval and a predetermined equation relating the AV interval to an optimal AV delay are used to provide a maximum positive rate of left ventricular pressure change during systole. An AV delay is calculated using a predetermined percentage of the optimal AV delay to deliver ventricular pacing pulses to provide a desired level of stress for cardiac protective pacing therapy (CPPT) to provide a cardiac conditioning therapy to improve autonomic balance.
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Citations
22 Claims
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1. A method for delivering pacing pulses, comprising:
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sensing intrinsic atrioventricular (AV) intervals; using the intrinsic AV interval and a predetermined equation relating the AV interval to a calculated optimal AV delay to provide a maximum positive rate of left ventricular pressure change during systole; and calculating an AV delay using a predetermined percentage of the calculated optimal AV delay to deliver ventricular pacing pulses, wherein the predetermined percentage is less than 100%, to provide a desired level of stress by introducing or augmenting dyssynchrony for cardiac protective pacing therapy (CPPT) to provide a cardiac conditioning therapy to improve autonomic balance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for operating a cardiac pacing device, comprising:
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delivering cardiac protective pacing therapy (CPPT) to provide a cardiac conditioning therapy to improve autonomic balance to one or more ventricular sites in an atrial tracking pacing mode with an atrioventricular (AV) delay; sensing intrinsic AV intervals; modulating the AV delay based on the sensed intrinsic AV intervals, including calculating AV delay using the intrinsic AV interval and a predetermined equation relating the AV interval to a calculated optimal AV delay, and using a predetermined percentage of the calculated optimal AV delay to deliver ventricular pacing pulses to provide a desired level of stress by introducing or augmenting dyssynchrony for the CPPT, wherein the predetermined percentage is less than 100%; sensing heart rate (HR) in response to the pacing pulses; and dynamically adjusting parameters of the AV delay for the pacing pulses based on the sensed HR in a closed loop system. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A system, comprising:
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a signal input to receive at least one cardiac signal indicative of cardiac events including at least one atrial event and one ventricular event; an event detector, coupled to the signal input, to detect the at least one atrial event and one ventricular event; a measurement module, coupled to the event detector, to measure an atrioventricular (AV) time interval between an atrial event and a ventricular event; and an AV delay calculator coupled to the measurement module, the AV delay calculator adapted to calculate an AV delay using the AV interval and a predetermined equation relating the AV interval to a calculated optimal AV delay to provide a maximum positive rate of left ventricular pressure change during systole, and further adapted to calculate a percentage of the calculated optimal AV delay to deliver ventricular pacing pulses to provide a desired level of stress by introducing or augmenting dyssynchrony for cardiac protective pacing therapy (CPPT) to provide a cardiac conditioning therapy to improve autonomic balance, wherein the percentage is less than 100%. - View Dependent Claims (19, 20, 21, 22)
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Specification