METHOD AND APPARATUS FOR OPTIMIZING VENTRICULAR SYNCHRONY DURING DDD RESYNCHRONIZATION THERAPY USING ADJUSTABLE ATRIO-VENTRICULAR DELAYS
First Claim
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1. A cardiac rhythm management system, comprising:
- an atrio-ventricular delay (AVD) calculator adapted to calculate one or more AVDs using one or more measured atrio-ventricular time intervals (AVs) and an equation relating each AV of the one or more measured AVs to an optimal AVD to provide a maximum positive rate of left ventricular pressure change during systole, LV+dp/dt, by delivering ventricular pacing pulses using the optimal AVD, the each AV being a time interval between an atrial event and an intrinsic ventricular event.
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Abstract
A pacing system for providing optimal hemodynamic cardiac function for parameters such as ventricular synchrony or contractility (peak left ventricle pressure change during systole or LV+dp/dt), or stroke volume (aortic pulse pressure) using system for calculating atrio-ventricular delays for optimal timing of a ventricular pacing pulse. The system providing an option for near optimal pacing of multiple hemodynamic parameters. The system deriving the proper timing using electrical or mechanical events having a predictable relationship with an optimal ventricular pacing timing signal.
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Citations
20 Claims
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1. A cardiac rhythm management system, comprising:
an atrio-ventricular delay (AVD) calculator adapted to calculate one or more AVDs using one or more measured atrio-ventricular time intervals (AVs) and an equation relating each AV of the one or more measured AVs to an optimal AVD to provide a maximum positive rate of left ventricular pressure change during systole, LV+dp/dt, by delivering ventricular pacing pulses using the optimal AVD, the each AV being a time interval between an atrial event and an intrinsic ventricular event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for operating a cardiac rhythm management system, the method comprising:
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measuring one or more atrio-ventricular time intervals (AVs) each between an atrial event and an intrinsic ventricular event; and calculating one or more atrio-ventricular delays (AVDs) using the one or more AVs and an equation relating each AV of the one or more AVs to an optimal AVD to provide a maximum positive rate of left ventricular pressure change during systole, LV+dp/dt, by delivering ventricular pacing pulses using the optimal AVD. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification