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AssigneePacesetter, Inc.
InventorsPaul A. Levine, Jason A. Sholder, Gene A. Bornzin, Joseph J. Florio, Kenneth Valikai, Lisa P. Weinberg
Estimating the term…
Preemptive tachyarrhythmia pacing is provided in an implantable cardiac-stimulation device, such as an implantable pacemaker or defibrillator, by modifying the operation of the implantable device in a way that minimizes the likelihood of occurrence of a tachyarrhythmia. The behavior modification is achieved through the use of an appropriate preemptive tachyarrhythmia pacing control routine stored within the memory of the device. Depending upon the needs of the patient, preemptive tachyarrhythmia pacing is invoked continuously or on demand. If invoked on demand, Preemptive tachyarrhythmia pacing is triggered only upon the sensing of one or more conditions suggest that the onset of a tachyarrhythmia is imminent. When thus invoked, preemptive tachyarrhythmia pacing remains invoked only for as long as the onset-of-a-tachyarrhythmia-is-imminent conditions persist. Various preemptive tachyarrhythmia pacing control routines are contemplated, including those based on overdrive pacing, pacing with randomicity, and mode switching. Overdrive pacing, when used, is based on an automatically-determined diurnal rate, an automatic stepped increase over the average atrial rate, or a rate set by a cycle-to-cycle negative hysteresis. Conditions which suggest the imminency of the onset of a tachyarrhythmia include, but are not limited to, a sudden change in the patient's cardiac cycle from a previously-determined normal cardiac cycle.
A method of operating an implantable medical device in one of a main operating mode or a preemptive tachyarrhythmia preventive pacing operating mode, the implantable medical device including pulse generating means for generating pacing pulses and directing such pulses to cardiac tissue of a patient, the pulse generating means being controlled by a processor, the processor being coupled to a memory wherein an operating program for controlling the operating modes may be stored, the method comprising the steps of:
A method of operating an implantable tissue-stimulating medical device in a preemptive tachyarrhythmia pacing mode for the purpose of preventing the occurrence of a tachyarrhythmia, said method comprising:
A method of operating an implantable tissue-stimulating device, the device having generating means for generating electrical stimulating pulses of specified energies and applying the pulses to body tissue at specified times, and means for sensing natural muscle contractions of the body tissue, the method comprising:
An implantable cardiac tissue-stimulating device comprising:
Dependencies are inferred from the claim text.