ISSN:
0197-8462
Keywords:
ELF magnetic field
;
ECG
;
cardiac tissue
;
beat frequency
;
Life and Medical Sciences
;
Occupational Health and Environmental Toxicology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
,
Physics
Notes:
Isolated rat hearts and excised canine cardiac tissues were subjected to pulsed magnetic fields. The fields excited in coils by tandem pairings of sinusoidal pulses were presented at various inter-pair delays and repetition rates. The waveform of the magnetic field was a single or multiple sinusoid followed after a variable delay by another single or multiple sinusoid. Small but reliable increases in the beating rate of rat heart were observed. Similar increases occurred in contraction rates of canine tissues. Both preparations exhibited a contraction-rate dependency on the repetition rate of the paired magnetic pulses: 4.5-6 rep/s for canine tissue, and 20-25 and 40-55 reps/s for rat heart. Flux-density thresholds for both preparations approximated 10 mT (100 gauss) rms. © 1992 Wiley-Liss, Inc.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bem.2250130405
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