초록 ▼

An implantable cardiac device for providing cardioversion and defibrillation therapies is provided, which forecasts time-to-therapy based on battery voltage degradation and provides an enhanced energy shock in the event a predetermined threshold time is reached. The device also monitors elapsed time

An implantable cardiac device for providing cardioversion and defibrillation therapies is provided, which forecasts time-to-therapy based on battery voltage degradation and provides an enhanced energy shock in the event a predetermined threshold time is reached. The device also monitors elapsed time-to-therapy to determine whether the predetermined threshold time is exceeded and sets the energy content of the therapeutic shock accordingly.

대표청구항 ▼

A method of administering therapeutic shocks from an implantable cardiac stimulating device to a patient\s heart to interrupt cardiac arrhythmias, the method comprising the steps of: detecting the onset of a cardiac arrhythmia; monitoring the device operational parameter to forecast the amount of ti

A method of administering therapeutic shocks from an implantable cardiac stimulating device to a patient\s heart to interrupt cardiac arrhythmias, the method comprising the steps of: detecting the onset of a cardiac arrhythmia; monitoring the device operational parameter to forecast the amount of time required from the onset of a cardiac arrhythmia to generate and deliver the therapeutic shock; selecting the nominal energy level for the therapeutic shock when the forecasted time is less than a prescribed critical time; selecting the increased energy level for the therapeutic shock when the forecasted time equals or exceeds the prescribed critical time; and generating a therapeutic shock at one of (a) a nominal energy level, and (b) an increased energy level, and delivering the therapeutic shock to the patient\s heart, wherein an amount of time from the onset o a cardiac arrhythmia is required to generate and deliver the therapeutic shock, the amount of time varying as a function of a device operational parameter.