Implantable cardioverter defibrillator employing polymer thin fi

Details Implantable cardioverter defibrillator employing polymer thin fi Implantable cardioverter defibrillator employing polymer thin fi

1994-11-21

1996-06-18

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

A61N 139

Patent

active

055273467

ABSTRACT:
An implantable cardioverter defibrillator (ICD) system employs polymer film capacitor technology for the capacitor system. Unlike existing ICD systems which utilize electrolytic capacitors, the ICD system of the present invention utilizes polymer thin film capacitors to deliver an electrical countershock having an effective pulse duration of greater than the chronaxie duration of the human heart from a maximum stored energy of less than about 35 joules when charged to a maximum charging voltage of at least about 800 volts. Preferably, the polymer thin film capacitors having a dielectric thickness of between about 1,000 nm and 10,000 nm and an effective capacitance of the less than about 80 .mu.F with a maximum charging voltage of less than about 1500 volts or a maximum peak current of less than about 30 amperes.

REFERENCES:
patent: 3614954 (1971-10-01), Mirowski et al.
patent: 4945449 (1990-07-01), Cansell et al.
patent: 5337209 (1994-08-01), Sutherland et al.
patent: 5342399 (1994-08-01), Kroll
patent: 5384544 (1995-01-01), Flugstad et al.
Alterations Inudced By A Singe Defibrillation Shock Appiled Through A Chronically Implanted Catheter Electrode By Barker-Voelz et al., J. Electrocardiology 16(2):167-180, 1983.

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