Impedance dependent implantable cardioverter-defibrillator

Details Impedance dependent implantable cardioverter-defibrillator Impedance dependent implantable cardioverter-defibrillator

1996-10-02

1998-02-24

Lateef, Marvin M.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

607 63, A61N 139

Patent

active

057207674

ABSTRACT:
An implantable cardiac stimulation device contains a high voltage defibrillating unit. A protection circuit is connected to the defibrillating unit to guard against excessive current during a high voltage discharge. The protection circuit prevents damage to the defibrillation unit and to the associated heart tissue. The defibrillation current is monitored by the protection circuit and if excessive, the defibrillation current is reduced by routing the current through an additional impedance. The protection circuit operates in real-time to remove the additional impedance if the defibrillation current returns to a safe level. A memory device attached to the protection circuit records the event of an excessive defibrillation current.

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patent: 5433732 (1995-07-01), Hirsehberg et al.
patent: 5531769 (1996-07-01), Fossan et al.

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