Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1992-11-03
1994-05-17
Cohen, Lee S.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
A61N 100
Patent
active
053124529
ABSTRACT:
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.
REFERENCES:
patent: 3902479 (1975-09-01), Chaumet
patent: 4592367 (1986-06-01), Imran
patent: 4719921 (1988-01-01), Chirife
patent: 4759366 (1988-07-01), Callaghan
patent: 4759367 (1988-07-01), Callaghan
Cardiac Pacemakers Inc.
Cohen Lee S.
Parker Marianne
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