EDGAR A. HINES JR., M.D.; GEORGE E. BROWN, M.D., F.A.C.P.
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In health there is a balance of the various divisions of the autonomic nervous system that varies with the normal physiologic demands. It is likely that phylogenetic and anatomic factors, as well as the functional requirements of the organs have determined certain thresholds of activity of the sympathetic control of the different organs. The maintenance of cardiac rate at about 70 beats a minute, the control of surface temperature within a certain range, the activity of the sweat glands, and the control of the arterial blood pressure, illustrate these physiologic balances. Overactivity of the sympathetic and parasympathetic components of the
HINES EA, BROWN GE. A STANDARD TEST FOR MEASURING THE VARIABILITY OF BLOOD PRESSURE: ITS SIGNIFICANCE AS AN INDEX OF THE PREHYPERTENSIVE STATE*. Ann Intern Med. 1933;7:209–217. doi: https://doi.org/10.7326/0003-4819-7-2-209
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Published: Ann Intern Med. 1933;7(2):209-217.
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