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RATE OF STABILISATION OF SYSTOLIC BLOOD-PRESSURE FOLLOWING ADOPTION OF THE SUPINE POSTURE
1 Division of Physiology of the Medical School, and the Institute of Child Welfare, University of California, Berkeley
A change in systolic blood-pressure was observed during the first 10 minutes of a series of successive measurements made in the supine posture. On the average this was a fall. The experimental findings are presented as group average plots and as frequency curves. Experiments in which manipulation, nervousness, and rest following activity were controlled suggested that none of these was the cause of this fall.
The fall was produced by the change from the erect to the supine posture.
The probable mechanism of the change and its significance in estimating resting blood-pressure in an individual are discussed.
No comparable change was observed in diastolic blood-pressure.
Submitted on September 21, 1938
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