Cardiac pacemaker

Details Cardiac pacemaker Cardiac pacemaker

1976-10-26

1978-10-17

Kamm, William E.

Surgery

Truss

Pad

A61N 136

Patent

active

041203070

ABSTRACT:
Apparatus for indicating end of battery life in a cardiac pacemaker. A battery voltage monitoring circuit provides an indication of battery voltage drop below a predetermined level. A counter circuit and decode logic respond to the voltage drop indication to block a portion of a predetermined number of the generated pacing pulses from the heart to induce a benign arrhythmia in the heart thereby indicating end of battery life. In another embodiment a plurality of voltage sensors indicate progressive decreases in battery voltage and are connected with decode logic to block an increasing number of pacing pulses to indicate worsening battery condition.

REFERENCES:
patent: 3557796 (1971-01-01), Keller, Jr. et al.
patent: 3618615 (1971-11-01), Greatbatch
patent: 3662759 (1972-05-01), Dabolt
patent: 3738371 (1973-06-01), Raddi et al.
patent: 3841336 (1974-10-01), Daynard

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