Key result
Registration of pacemaker-induced skin potentials via ECG leads identified pacing failure, with a fall in amplitude of 20% or more indicating reduced current output in 14 patients.
Why the study?
Does the registration of pacemaker-induced skin potentials using ECG leads and an oscilloscope detect and differentiate pacing failures in patients with implanted pacemakers?
Observational (n=14)
Does the registration of pacemaker-induced skin potentials using ECG leads and an oscilloscope detect and differentiate pacing failures in patients with implanted pacemakers?
Indirect registration of pacemaker stimulus waves via ECG leads and an oscilloscope is a valuable method for routine control and differential diagnosis of pacing failures.
Answers are grounded in this paper and cite their sources.
Skin potential monitoring via ECG may detect pacemaker output failure; leaves open reliability and utility pending prospective validation.
The stimulus wave from an implanted pacemaker may be registered indirectly by ordinary ECG leads and displayed on a fast-moving oscilloscope. The amplitude of the curve thus registered will be proportional to the pacing current.A fall in amplitude of 20 % or more in all ECG leads indicates a reduced current output from the pacemaker. In pacemakers giving impulses of the capacitor discharge type failures in the pacing electrodes will be diagnosed by altered wave form, while in failure due to battery depletion only the amplitude will be reduced. Experience from 14 patients shows that the method is most valuable in the differential diagnosis of established pacing failure. In addition, it may detect unexpected failures in pacing leads or batteries if it is used for routine control of pacemaker patients.
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H Grendahl (1969) conducted an observational in Implanted pacemakers (n=14). Registration of pacemaker-induced skin potentials was evaluated on Differential diagnosis of established pacing failure. Registration of pacemaker-induced skin potentials via ECG leads identified pacing failure, with a fall in amplitude of 20% or more indicating reduced current output in 14 patients.
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