Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1992-12-14
1994-02-01
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 1365
Patent
active
052828395
ABSTRACT:
A rate responsive cardiac pacemaker for providing an optimized pacing rate of stimulation pulses as a function of at least one selected rate control parameter. Each rate control parameter has a value which varies as a function of changes in a patient's physiologic demand and includes a sensor system for sensing the rate control parameter value and for providing a sensor output representative thereof. The cardiac pacemaker also includes a rate response defining means for deriving desired pacing rates as a function of the sensor output, an achievement monitoring means that has a predetermined achievement criterion (primary criterion), for monitoring the relationship between the derived pacing rates and the achievement criterion over an optimization period, and either one of Average Activity level or Average Activity Difference level monitoring means that has a corresponding predetermined minimum and a predetermined maximum Average Activity level or Average Activity Difference level (secondary criterion), for monitoring the relationship between the derived pacing rates and the secondary criterion over an optimization period. Another optimization function is provided by adjusting a sensor weighting value which weights or regulates the relative contribution each sensor's derived desired pacing rates will contribute toward the pacemaker-derived optimized pacing rates.
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Bennett Tommy D.
Nichols Lucy M.
Roline Glenn M.
Thompson David L.
Holmbo Dwight N.
Kamm William E.
Medtronic Inc.
Patton Harold R.
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