Cardiac pacing using adjustable atrio-ventricular delays
AssigneeCardiac Pacemakers, Inc.
InventorsJiang Ding, Yinghong Yu, Andrew P. Kramer, Julio Spinelli
Life of this patent
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Abstract
A pacing system for providing optimal hemodynamic cardiac function for parameters such as 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.
Claims28
A method, comprising:
- sensing a first cardiac event from a cardiac cycle;
- determining a second cardiac event from the cardiac cycle that has an approximately constant timing relationship with respect to the first cardiac event;
- determining a first time interval between the first cardiac event and the second cardiac event;
- and
- delivering a pacing pulse to approximately optimize a cardiac performance parameter being a measure of systolic performance using a delay time interval referenced to the first cardiac event and calculated from the first time interval between the first cardiac event and the second cardiac event by using a predetermined mathematical relationship of the first time interval to an approximately optimal delay time interval for optimizing the cardiac performance parameter.
Dependencies are inferred from the claim text.