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AssigneeCardiac Pacemakers, Inc.
InventorRodney W. Salo
Estimating the term…
A dual chamber cardiac pacemaker incorporating a microprocessor-based controller which is programmed to automatically establish an A-V interval at a value which provides optimum cardiac function but without the need for a special sensor for measuring cardiac function is described. The microprocessor is programmed to continuously monitor heart rate and variation in heart rate and only when the patient is stable, enter a parameter adjustment loop in which the pacemaker's A-V interval is incremented in several discrete steps and for each step, the corresponding average steady-state heart rate is measured and stored. When the A-V interval incrementation process causes that interval to reach a predetermined upper limit, the pacemaker's A-V interval is set at the value that corresponds with the minimum average heart rate to thereby maximize cardiac performance.
A cardiac pacemaker comprising;
A method of operating a cardiac pacemaker, said pacemaker being of a dual chamber type having means for sensing atrial and ventricular depolarization signals and pulse generator means for applying stimulating pulses to at least one ventricle following a predetermined A-V interval from an occurrence of a preceding atrial depolarization signal and a microprocessor-based controller having a memory means for storing state variables therein, said controller being coupled to said sensing means and in controlling relation to said pulse generator means, comprising the steps of;
Dependencies are inferred from the claim text.