Surgery – Truss – Pad
Patent
1982-09-13
1985-02-12
Kamm, William E.
Surgery
Truss
Pad
A61N 136
Patent
active
044984782
ABSTRACT:
A method and apparatus embodied in a pacemaker for attenuating polarization currents or voltages at the output terminals of the pulse generator. A heart pacemaker typically possesses a source of supply voltage, an output capacitor, an output terminal adapted to be coupled to heart tissue. A voltage source is coupled to the output capacitor during a first time interval for charging the output capacitor to a certain voltage. The output capacitor is coupled to the output terminals during a second time interval to discharge its voltage into the heart tissue. A resistor is coupled across the output terminals for providing a current path for the discharging and recharging of the effective capacitance of the stimulated heart tissue. The resistor may be coupled across the output terminals only during the first time interval and not during the discharge of the output capacitor.
REFERENCES:
patent: 3759266 (1973-09-01), Lee
patent: 4056105 (1977-11-01), Ravas
patent: 4114627 (1978-09-01), Lewyn et al.
patent: 4343311 (1982-08-01), Markowitz
patent: 4378020 (1983-03-01), Nappholz et al.
Varriale, M.D., Philip and Naclerio, M.D. Emil A., Cardiac Pacing, Lea and Febiger, 1979, pp. 298, 299.
Beck Robert C.
Breimayer Joseph F.
Kamm William E.
Medtronic Inc.
Rooney John L.
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