Microwave effects on isolated chick embryo hearts

This study was designed to examine the effects of microwaves on the electric activity of hearts as a means of elucidating interactive mechanisms of nonionizing radiation with cardiac tissue. Experiments were performed on isolated hearts of 9-12-day-old chick embryos placed in small petri dishes. Oxy...

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Bibliographic Details
Published inBioelectromagnetics Vol. 7; no. 4; p. 359
Main Authors Caddemi, A, Tamburello, C C, Zanforlin, L, Torregrossa, M V
Format Journal Article
LanguageEnglish
Published United States 1986
Subjects
Animals
Arrhythmias, Cardiac - etiology
Chick Embryo
Female
Heart - embryology
Heart - radiation effects
Heart Conduction System - radiation effects
Heart Rate - radiation effects
In Vitro Techniques
Microwaves
Pregnancy
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Summary:This study was designed to examine the effects of microwaves on the electric activity of hearts as a means of elucidating interactive mechanisms of nonionizing radiation with cardiac tissue. Experiments were performed on isolated hearts of 9-12-day-old chick embryos placed in small petri dishes. Oxygenated isotonic Ringer's solution at 37 degrees C permitted heart survival. Samples were irradiated at 2.45 GHz with a power density of 3 mW/cm2. The heart signal was detected with a glass micropipet inserted into the sinoatrial node and examined by means of a Berg-Fourier analyzer. Pulsed microwaves caused the locking of the heartbeat to the modulation frequency, whereas continuous wave irradiation might have induced slight bradycardia. Pulsed fields induced stimulation or regularization of the heartbeat in arrhythmia, fibrillation, or arrest of the heart.
ISSN:0197-8462
DOI:10.1002/bem.2250070403