[Skip to Content]
Access to paid content on this site is currently suspended due to excessive activity being detected from your IP address 54.163.94.5. Please contact the publisher to request reinstatement.
[Skip to Content Landing]
Article
October 3, 1977

Tests in Patients With Pacemakers-Reply

Author Affiliations

Bureau of Medical Devices Food and Drug Administration Silver Spring, Md

JAMA. 1977;238(14):1501. doi:10.1001/jama.1977.03280150071022
Abstract

In Reply.—  The stimulus artifact can be reduced to an acceptable level by either increasing the input impedance of the differential recording amplifier or increasing the impedance between the stimulator output and ground.1 A stimulator with a grounded output (stimulator to ground impedance is approximately zero) can be used if a differential amplifier with a high input impedance is used to avoid overloading the amplifier. Normally, however, an isolated stimulator (stimulator to ground impedance is very high) is used so that the input impedance of the amplifier is less critical.

×