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The Electrocardiogram as an Indicator of Acceleration Stress

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2 Author(s)
W. C. Sipple ; Aviation Medical Acceleration Lab., U.S. Naval Air Dev. Ctr., Johnsville, Pa. ; B. D. Polis

By means of a transistor amplifier mounted before the slip rings of an animal centrifuge it was possible to obtain recordings of the EKG of rats under acceleration stress. With this information, a physiological end point for the tolerance of the rat to 20 G (positive acceleration) was defined as the time to reduce the heart rate of the animal from an initial state ranging from seven to nine beats per second to a final moribund state of 2 beats per second. The instrumentation and techniques employed permit the option of recovering the animal alive after approaching the limit of tolerance to acceleration.

Published in:

IRE Transactions on Bio-Medical Electronics  (Volume:8 ,  Issue: 3 )