| 摘要 |
An implantable cardiac stimulation device (10) contains a high voltage defibrillating unit (16). A protection circuit (60) 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 (12). 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.
|
