title: The influence of 50 Hz electric and magnetic fields on the extrasystoles of human heart.
abstract: This investigation studied the effect of 50 Hz electric and magnetic fields on the extrasystoles of human heart. The electrocardiograms (ECG) of 27 transmission-line workers and 26 male volunteers were recorded with a Holter monitor both in and outside the fields. The electric field strength varied from 0.14 to 10.21 kV/m and the magnetic flux density from 1.02 to 15.43 microT. The measurement period was from half an hour to a few hours. Analysis of the ECG recordings showed that extrasystoles were as frequent outside the field as in the field. In some cases a small decrease in heart rate was observed after field exposure, but it is possible that the changes in the pulse rate were caused by small changes of work load.
authors.affiliation: Tampere University of Technology, Finland.
authors.forename: L
authors.initials: L
authors.lastname: Korpinen
authors.forename: J
authors.initials: J
authors.lastname: Partanen
mesh_terms: D000293:Adolescent; D000328:Adult; D005117:Cardiac Complexes, Premature / Q000209:etiology*; D011211:Electric Power Supplies / Q000009:adverse effects; D015716:Electrocardiography, Ambulatory; D004574:Electromagnetic Fields / Q000009:adverse effects*; D005387:Finland; D006339:Heart Rate / Q000528:radiation effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016273:Occupational Exposure