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Article
May 1913

EFFECT OF CHANGE OF POSTURE — WITHOUT ACTIVE MUSCULAR EXERTION—ON THE ARTERIAL AND VENOUS PRESSURES

Author Affiliations

PITTSBURGH

From the Department of Student Health, Carnegie Institute of Technology.

Arch Intern Med (Chic). 1913;XI(5):485-494. doi:10.1001/archinte.1913.00060290019002
Abstract

In this consideration we present the results of our investigations on the effects produced by change of posture, when this change is brought about without effort on the part of the subject. It is, of course, understood that in the standing posture there is exerted a constant muscular effort, while in the horizontal posture this element is eliminated.

METHODS  Our subjects were placed on a table with a movable top. This top was set and balanced so that when the subject was once placed in position, he had no further occasion for voluntary muscular effort. After stepping onto the foot-board of the table, which was about 6 inches above the floor, the arm-pieces of the blood-pressure instruments were attached. The instrument for arterial pressure was of the usual type, mercury column, cuff 10 cm. wide. The apparatus for measuring the venous pressure was that of the type constructed

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