초록 ▼

A heart pacer in which the magnitude of the end-of-life test current source is programmable. This effectively allows the physician to program the condition which will control a switch-over to end-of-life operation. It also allows the physician to override end-of-life operation after it initially tak

A heart pacer in which the magnitude of the end-of-life test current source is programmable. This effectively allows the physician to program the condition which will control a switch-over to end-of-life operation. It also allows the physician to override end-of-life operation after it initially takes place following a failing of the end-of-life test. The pacer also includes an additional end-of-life test involving the continuous monitoring of the supply potential and a switch-over to end-of-life operation should the pacer powering potential momentarily fall below a threshold level.

대표청구항 ▼

A programmable heart pacer comprising a power source, a pulse generator for generating pacing pulses, means for storing externally-generated parameter values and for controlling the operation of said pulse generator in accordance with the stored parameter values, and means for detecting the approach

A programmable heart pacer comprising a power source, a pulse generator for generating pacing pulses, means for storing externally-generated parameter values and for controlling the operation of said pulse generator in accordance with the stored parameter values, and means for detecting the approach of the end of life of said power source and in response thereto for storing in said storing means predetermined parameter values, said detecting means including means for selectively connecting a test current source across said power source and means for comparing with a reference value the potential across said power source when a test current flows therethrough, characterized by said storing means further storing a variable test current source magnitude parameter value, and means for controlling the magnitude of said test current source in accordance with the stored test current source magnitude parameter value.