PMID: 6209625Nov 1, 1984Paper

Noninvasive detection of insulation break

Pacing and Clinical Electrophysiology : PACE
B FerekS Tonković

Abstract

The electric current leak through an unsealed connector or insulation break can be a source of problems in cardiac pacing. This study describes a method of leak detection. The underdrive inhibition test--chest wall stimulation with external stimulator (ES)--was used for this purpose. Three cutaneous electrodes (CE) were applied: the first one above the indifferent electrode, the second one above the suspected leak location, and the third one above the active electrode. Two inhibition thresholds (IT) were measured: the first one connecting ES on first CE and second CE, and the second one connecting ES on first CE and third CE. The inhibition threshold is the value of ES output charge at which the inhibition of implanted pacemaker occurs. The relation between two ITs, not the absolute value, is significant for leak estimation. The former should be at least five times higher than the latter, if there is no current leak. During the two years of follow-up of 541 patients, 272 measurements were performed. In 52 cases the connector leak was found-both ITs were approximately equal. Twenty-seven cases were confirmed by surgery for EOL pacemaker replacement; the intrusion of body fluid was evident. Five operations were indicated because ...Continue Reading

References

Nov 1, 1969·British Heart Journal·G D GreenA C Kenmure
Apr 1, 1971·Cardiovascular Research·D SmithG Sloman
Sep 1, 1981·Pacing and Clinical Electrophysiology : PACE·P J RadcliffeD E Ward

Citations

Feb 1, 1995·Pacing and Clinical Electrophysiology : PACE·B M van GelderM I El Gamal
Aug 1, 1989·Pacing and Clinical Electrophysiology : PACE·B BreyerI Cikes
Nov 1, 1992·Pacing and Clinical Electrophysiology : PACE·G F TyersJ Clark

Related Concepts

Cardiac Pacing, Artificial
Electric Stimulation Technique
Implantable Stimulation Electrodes
Electromagnetic Fields
Misuse, Equipment
Artificial Cardiac Pacemaker
Repeat Surgery
Chest
Electrical Phenomena

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