METHOD AND APPARATUS FOR ADJUSTABLE AVD PROGRAMMING USING A TABLE
First Claim
1. An apparatus for programming a cardiac pacemaker, the apparatus comprising:
- a look-up table including values of a first cardiac parameter, values of a second cardiac parameter, and values of a programmable pacing parameter arranged to allow mapping of a measured value of the first cardiac parameter and a measured value of the second cardiac parameters to one of the values of the programmable pacing parameter.
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Abstract
A pacing system provides for 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 deriving the proper timing using electrical or mechanical events having a predictable relationship with an optimal ventricular pacing timing signal. A look-up table relating the timing of such electrical or mechanical events to atrio-ventricular delay time intervals is provided for programming the pacing system.
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Citations
20 Claims
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1. An apparatus for programming a cardiac pacemaker, the apparatus comprising:
a look-up table including values of a first cardiac parameter, values of a second cardiac parameter, and values of a programmable pacing parameter arranged to allow mapping of a measured value of the first cardiac parameter and a measured value of the second cardiac parameters to one of the values of the programmable pacing parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for programming a cardiac pacemaker, the apparatus comprising:
a look-up table for determining an atrio-ventricular delay (AVD) using a measured atrio-ventricular interval (AV) and a measured QRS duration, the look-up table including;
an AV list including a plurality of AV value ranges;
a QRS duration list including a plurality of QRS duration ranges; and
a plurality of atrio-ventricular delay (AVD) lists each corresponding to one of the QRS duration ranges and including a plurality of AVD values each corresponding to one of the AV value ranges, wherein each AVD value of the plurality of AVD lists is calculated using an equation relating the AVD to the AV and constants each selected using the QRS duration. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method for producing a look-up table for a cardiac pacing device, the method comprising:
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generating a plurality of first value ranges for a first cardiac parameter;
generating a plurality of second value ranges for a second cardiac parameter;
determining values for a programmable pacing parameter each corresponding to one value range of the plurality of first value ranges and one value range of the plurality of second value ranges; and
producing a look-up table including the plurality of first value ranges, the plurality of second value ranges, and the values for the programmable pacing parameter arranged to allow mapping of a measured value of the first cardiac parameter and a measured value of the second cardiac parameter to one of the values for the programmable pacing parameter. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification