04665919 is referenced by 26 patents and cites 12 patents.

A device such as a cardiac pacemaker or other implantable biomedical device, and method of operation thereof, containing one or more switchable circuits. A control system, preferably incorporating a microprocessor, controls predetermined changes of the operating characteristics of the switchable circuits. In a cardiac pacer embodiment, a circuit such as the input amplifier can be switched to have different characteristics, e.g. filter setting and sensitivity, during predetermined portions of the pacer cycle. Further, the operation of a circuit can be monitored over a plurality of operating cycles, with controlled switching of the circuit characteristics as a function of cumulative monitored circuit performance. A specific example of the invention is shown for changing characteristics of a filter circuit used in a pacer which adjusts the pacer rate as a function of determined stimulus-T wave time interval.

Title
Pacemaker with switchable circuits and method of operation of same
Application Number
475024
Publication Number
4665919
Application Date
September 19, 1985
Publication Date
May 19, 1987
Inventor
Hendrik L Brouwer
Dieren
NL
Kornelis A Mensink
Brummen
NL
Agent
Woodcock Washburn Kurtz Mackiewicz & Norris
Assignee
Vitafin
AN
IPC
A61N 1/36
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