Implantable cardiac stimulation device with parameter control
AssigneeSt. Jude Medical, Inc.
InventorsJohan Lidman, Jonas Andersson, Sven-Erik Hedberg
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Abstract
An implantable cardiac stimulation device operates according to a first pacing algorithm executable by a microprocessor and which is able to independently perform stimulation therapy for a patient's heart, as well as according to a second pacing algorithm which is also microprocessor-executable. The first and second algorithms actively generate stimulation parameters during each cardiac cycle, but the stimulation parameters generated by the second algorithm are only permitted to result in actual stimulation therapy if those parameters fall within parameter ranges that are calculated to be allowable for stimulation by the first algorithm.
Claims11
An implantable cardiac stimulation device comprising:
- a stimulation administration arrangement, adapted for interaction with a patient, for administering physiological stimulation to the patient;
- a memory arrangement in which a first stimulation algorithm and a second stimulation algorithm are stored;
- and
- a microprocessor arrangement having access to said memory arrangement and connected to said stimulation administration arrangement, said microprocessor arrangement executing said first stimulation algorithm to generate stimulation parameters in each heart cycle of said patient and to calculate permissible ranges respectively for said stimulation parameters, and executing said second stimulation algorithm to generate further stimulation parameters in each heart cycle of said patient, said microprocessor controlling said stimulation administration arrangement to administer said physiological stimulation using said stimulation parameters generated by executing said first stimulation algorithm, and to instead, under predetermined conditions, administer said physiological stimulation using said stimulation parameters generated by executing said second stimulation algorithm, said predetermined conditions including a requirement that said further stimulation parameters generated by said second stimulation algorithm are within said parameter ranges.
Dependencies are inferred from the claim text.