The Effect of Power Frequency High Intensity Electric Fields on Implanted Cardiac Pacemakers
- 1 September 1983
- journal article
- case report
- Published by Wiley in Pacing and Clinical Electrophysiology
- Vol. 6 (6), 1282-1291
- https://doi.org/10.1111/j.1540-8159.1983.tb04472.x
Abstract
Thirty-five patients fitted with 16 different pacemaker models (from 6 manufacturers) were exposed to 50 Hz electric fields up to a maximum of 20 kV/m. Four different response patterns were encountered: (1) normal sensing and pacing in all Medtronic and some Vitatron units; (2) reversion to the fixed (interference) rate in all Telectronics, all Pacesetter, some Vitatron and CPI units; (3) slow and irregular pacing in one CPI and in all Cordis units; (4) mixed behavior over a critical range of field strengths in which slow and irregular pacing preceded reversion to fixed-rate, in some Telectronics and Pacesetter units. The field strengths required to induce such behavior varied from unit to unit and from model to model, with Telectronics being the most sensitive. In general, the interference threshold depended on the magnitude and distribution of induced body current relative to the pacemaker as well as field strength and thus varied with patient height, build and posture. While only a small proportion of pacemaker patients are likely to encounter electric fields strong enough to interfere with pacemaker behavior, this possible hazard should be recognized.Keywords
This publication has 12 references indexed in Scilit:
- Electrocardiographic recording in high-intensity electric fields: an application of radio-telemetryJournal of Medical Engineering & Technology, 1983
- Spectral Properties of Atrial and Ventricular Endocardial SignalsPacing and Clinical Electrophysiology, 1979
- Electrical interference in non-competitive pacemakersHeart, 1970
- The Influence of Electromagnetic Environment on the Performance of Artificial Cardiac PacemakersThe Annals of Thoracic Surgery, 1968
- Ventricular Fibrillation and Competitive PacingNew England Journal of Medicine, 1967
- Environmental Influence on Implantable Cardiac PacemakersJAMA, 1964
- Repetitive Ventricular Arrhythmia Resulting from Artificial Internal PacemakerCirculation, 1964
- ELECTRICAL HAZARDS ASSOCIATED WITH CARDIAC PACEMAKING*Annals of the New York Academy of Sciences, 1964
- MYOCARDIAL ELECTRODES AND THE DANGER OF VENTRICULAR FIBRILLATIONThe Lancet, 1961