Pacemaker having adaptive arrhythmia detection windows
AssigneeMedtronic, Inc.
InventorsJames H. Ericksen, Robert A. Betzold, Catherine R. Condie, Jeffrey M. Gillberg, Robert W. Stadler, John C. Stroebel, Troy E. Jackson
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Abstract
A device-implemented software system operates a detection window and adjusts PAV as needed after confirming the presence or detection of evidence of an arrhythmia. The detection window is monitored based on a preferred length. If the detection window is shorter than required, intervals are adjusted for a specific pacing rate. Further, the software system provides means for selecting detection over pacing based on an analysis of a preferred length in the presence of evidence of an arrhythmia.
Claims9
A device-implemented software system operating to monitor, control and adjust a detection window comprising:
- means for checking evidence of tachyarrhythmias;
- means for computing values between TLRI and DVAI;
- means for setting PAV based on results obtained from said means for computing values;
- and
- means for setting the TLRI equal to a sum of the DVAI and PAV;
- said means for checking, said means for setting PAV and said means for setting the TLRI being in operable logic control of said software system.
The software system of clam 1 wherein said means for checking tachyarrhythmias includes means for entering a ventricular event.
A method of adjusting PAV to minimize the input of atrial pacing in a detected tachyarrhythmias episode, the method comprising:
- monitoring evidence of possible tachyarrhythmia;
- comparing the difference between TLRI and DVAI with PAV if evidence of possible tachyarrhythmias is confirmed;
- comparing the difference between TLRI and DVAI with minimum PAV if the difference between TLRI and DVAI is less than PAV;
- setting PAV to the minimum PAV if the difference between TLRI and DVAI is less than the minimum PAV;
- and
- setting the TLRI equal to the sum of DVAI and PAV.
Dependencies are inferred from the claim text.