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J Appl Physiol 18: 261-263, 1963;
8750-7587/63 $5.00
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Frequency components and positional changes in electrocardiogram of the adult rat

Evangelos T. Angelakos 1 and Pamela Bernardini 1

1 Department of Physiology, Boston University School of Medicine, Boston, Massachusetts

Standard limb electrocardiograms of the adult rat (4–5 months old) were studied using cathode-ray oscillographic techniques. Fourier analysis revealed that the main QRS components can be represented with sine-wave frequencies of 50–400 cycles/sec. Gross distortion was observed with filters providing a high-frequency response of less than 250 cycles/sec. The mean QRS axis was found to be quite sensitive to positional changes.

Submitted on August 8, 1962






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