THE PHYSICAL CONCEPTION OF BLOOD PRESSURE
It is not sufficiently recognized, I believe, that the measurement of systolic pressure alone gives but incomplete evidence of the state of circulatory tension. Other data seem essential to an understanding of the condition, such as the constant or diastolic pressure existing between systoles and the actual head, or pulse pressure, forcing the blood column toward the periphery.In a previous article1I have endeavored to establish a conception of the subject from the standpoint of dynamics and statics. In this conception the diastolic pressure represents potential energy, since the blood column exerts energy of position and not motion during diastole. During systole, when the intraventricular pressure equals or slightly exceeds the diastolic pressure in the aorta, the aortic valves open. The pressure of a given volume of blood leaving the left ventricle must, however, be considerably in excess of the diastolic
STONE WJ. THE DIFFERENTIATION OF CEREBRAL AND CARDIAC TYPES OF HYPERARTERIAL TENSION IN VASCULAR DISEASE: A CLINICAL STUDY. Arch Intern Med (Chic). 1915;XVI(5):775–794. doi:10.1001/archinte.1915.00080050084003
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