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 for determining a programmable pacing parameter, the look-up table including;
a first input list including a plurality of value ranges of a first cardiac parameter;
a second input list including one or more value ranges of a second cardiac parameter; and
one or more output lists each corresponding to one value range of the one or more value ranges of the second cardiac parameter and including a plurality of atrio-ventricular delay (AVD) values each corresponding to one value range of the plurality of value ranges of the first cardiac 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.
211 Citations
36 Claims
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1. An apparatus for programming a cardiac pacemaker, the apparatus comprising:
a look-up table for determining a programmable pacing parameter, the look-up table including; a first input list including a plurality of value ranges of a first cardiac parameter; a second input list including one or more value ranges of a second cardiac parameter; and one or more output lists each corresponding to one value range of the one or more value ranges of the second cardiac parameter and including a plurality of atrio-ventricular delay (AVD) values each corresponding to one value range of the plurality of value ranges of the first cardiac parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A look-up table for determining a cardiac pacing parameter, the look-up table comprising:
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an intrinsic atrio-ventricular interval (AV) list including a plurality of AV value ranges; a QRS duration list including first and second QRS duration ranges; a first atrio-ventricular delay (AVD) list including a first plurality of AVD values each corresponding to one AV value range of the plurality of AV value ranges, the first AVD list corresponding to the first QRS duration range; and a second AVD list including a second plurality of AVD values each corresponding to one AV value range of the plurality of AV value ranges, the second AVD list corresponding to the second QRS duration range, wherein each AVD value in the first and second AVD lists is determined to provide for an approximately maximum positive rate of left ventricular pressure change during systole, LV+dp/dt, by delivering ventricular pacing pulses with that AVD value. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A method for determining a pacing parameter, the method comprising:
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generating a plurality of intrinsic atrioventricular interval (AV) value ranges; determining a first atrioventricular delay (AVD) value for each AV value range of the plurality of AV value ranges based on a first mathematical relationship between AVD and AV, the first mathematical relationship providing for an approximately maximum positive rate of left ventricular pressure change during systole, LV+dp/dt, by delivering ventricular pacing pulses with the AVD; and producing a look-up table allowing mapping the each AV value range of the plurality of AV value ranges to the first AVD value calculated using the first mathematical relationship. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification